This page is a list of similar works made during the same period of time. Sometimes one work intentionally copied another. Sometimes it's part of a wider trend in which that type of work became very popular all of sudden and others are made. Sometimes it's total coincidence: the creators just had the same idea. Which is the original and which is the imitation is not always completely clear; sometimes, however, it is painfully so.
Sometimes, rather than home-brew a knock off, a company will license a foreign work, and adapt it to be more like its competitor. Occasionally, creators will be forced to war with one another when they simultaneously produce similar works which are subsequently released within a short time from each other.
One thing to remember regarding Dueling Works is that Tropes Are Not Bad — while many Dueling Works appear to be blatant rip-offs, the competition between two shows (or simply the desire to set each other apart) often spurs each other to develop in quality. The result is a grateful television audience.
- Anime and Manga
- Live-Action TV
- Web Original
- Western Animation
- One happening within Marvel's own works between All-New Wolverine and the 2015 Old Man Logan over which is the "rightful successor" to previous Logan-led Wolverine books. Points in All-New Wolverine's favor is the title, and the fact that Laura is actively using the Wolverine name and is marketed as Wolverine by Marvel. However a segment of the fanbase considers Old Man Logan the "real" Wolverine book since it stars a Logan, while citing its much more violent content.
- This was practically a company-wide theme for Marvel in 2016-2017. Steve Rogers and Sam Wilson each got a Captain America title, Riri Williams and Victor Von Doom got "Invincible" and "Infamous" Iron Man, respectively, and for a brief point while the Unworthy Thor miniseries was running, Jane Foster Thor and Odinson Thor had a book each (and afterward the main Mighty Thor title featured both of them plus the new War Thor). The Wolverine example is distinct in that each character there had a different writer; the other "dueling" titles were orchestrated by the same writers. (Nick Spencer for Captains America, Brian Michael Bendis for Iron Men, and Jason Aaron for all your Thor needs.)
- DC's Doom Patrol and Marvel's X-Men. Both teams consisted of super-powered individuals shunned by the world, were led by a man in a wheelchair, and premiered within months of each other in 1963.
- DC's Who's Who and Marvel's Official Handbook of the Marvel Universe have competed with each other a number of times. During the original run of Who's Who in the mid-1980s, Marvel released the second volume of OHOTMU (also known as the Deluxe Edition). After releasing updates for Who's Who in 1987 and 1988, OHOTMU received an update in 1989 (that same year, DC included Who's Who entries in a number of their annuals). When DC revamped Who's Who in 1990 as a customizable loose-leaf edition, OHOTMU followed suit with their loose-leaf Master Edition before the end of the year.
- DC's Swamp Thing and Marvel's Man-Thing premiered around the same time in 1971, by writers who were roommates at the time. When Swamp Thing received his own series in 1972, his origin was changed and became much more similar to Man-Thing's, who also received an ongoing feature in Adventure into Fear at the same time.
- DC's Superman and Fawcett's Captain Marvel, so much so that when Captain Marvel's books sold better than Superman's, DC sued Fawcett over similarities between the characters. DC would eventually buy the rights to Captain Marvel from Fawcett. Ironically, these days Superman and Marvel have Friendly Fandoms due to their similarities.
- DC's Archives and Marvel's Masterworks series of hardcovers for reprinting classic runs.
- DC's Justice League of America and Marvel's The Avengers, both teams consisting of the biggest superheroes from each company.
- Champions (2016) and Teen Titans (Rebirth) have been launched around the same time and are flagship teen superhero team books of Marvel and DC's respective waves of comics of 2016, both feature very diverse cast and both are a subject of a Broken Base mostly breaking on each respective writers interpretation of the characters. They also both initially featured Animesque art styles. Main differences are that Champions feature mostly characters who hold their own books at the same time, while Teen Titans doesn't and that Champions tries to tackle serious social issues while Teen Titans focuses more on battles against supervillains.
- Disney's Frozen franchise and Dreamworks' Trolls franchise could be considered this. Both franchises are major cash cow franchises aimed at girls that are set in fantasy worlds and have a major focus on music. They both also have Christmas specials that were released the same exact weekend, and have upcoming sequels slated to be released in the same 3-month timeframe. In terms of DVD sales, Frozen is the more popular film, but Trolls has moved more merchandise than Frozen ever since it was released to theaters, to the point where it was the second-biggest licensed property the year it came out, only beaten by Star Wars.
- On March 19, 2018, there were two children's books written about [the pet rabbit of Vice President Mike Pence's family, Marlon Bundo, written from different sides of the political spectrum. The official version was written and illustrated by two of his daughters and was little more than a fluff promotional piece for them. Meanwhile, the other version was created by the team behind Last Week Tonight with John Oliver satirizing his more controversial views while still being for children and containing An Aesop about acceptance and the power of democracy, as well as all of the proceeds going to gay charities. While they both entered the bestseller's list on Amazon, John Oliver's won out by selling more copies (even reaching the #1 spot) and gaining way more positive reviews.
- Survivors, Dogs of the Drowned City, and The Last Dogs are three similar series that came out around the same time. They're children's xenofiction literature about a group of dogs surviving on their own in a city after their humans exacuate due to a natural disaster (an earthquake and a hurricane respectively in the first two). Dogs of the Drowned City was a trilogy, The Last Dogs was also a trilogy. while Survivors has over ten books and counting.
- The 2010s have the Peter Diamond series by Ben Aaronovitch and the Shadow Police series by Paul Cornell, which are both stories about Metropolitan Police "magical crime" squads written by former Doctor Who writers.
- Halestorm and The Pretty Reckless, both being 2010s Hard Rock bands with female lead vocalists, get compared a lot, e.g. this video. The two groups toured together for a month in 2015 and from the sound of it their respective frontwomen Lzzy Hale and Taylor Momsen actually get along pretty well.
- Whenever an artist releases multiple albums on the same day, there can be a competition to see which one will sell the most copies (examples: Guns N' Roses' Use Your Illusion I and II, Bruce Springsteen's Human Touch and Lucky Town, and the solo albums of all four KISS members).
- The classic example for this trope in music would be The Beatles and The Rolling Stones.
- An Older Than Steam problematic : in the 17th century Paris, the two only permanent theatres (Théâtre de l'Hotel de Bourgogne and Théâtre du Marais) would compete via "dueling pieces", sharing the same themes (and often adapted from the same foreign plays) and tailored for the "stars" of the respective troupes.
- The SpongeBob Musical and Escape From Margaritaville could be considered this, as both are tropical-themed musicals based on well-know pop culture icons that deal with the main characters facing a disaster and trying to stop it. While SpongeBob has received glowing praise, the reviews for Margaritaville have been negative. To make matters worse, there had been reports of the audience at the latter show acting very rude (doing thing like acting drunk and singing along to the songs). However, neither of them were big successes at the box office, with both shows closing the same year.