Trunks. The two timelines progress at an equal pace to one another, which means that the age gap between Gohan and Trunks in the Cell arc is still in place.
edited 10th Feb '18 7:14:41 PM by TobiasDrake
My Tumblr. Currently side-by-side liveblogging Digimon Adventure, sub vs dub.In their defense, neither did Goku. He was fifteen years old when he fought Piccolo Daimao and he looked like this
nonetheless. It was only in the time gap between that and the 23rd Tenkaichi Budokai that he spontaneously did all of his aging at once.
Between the four datapoints, Gohan is the freak. Weird-ass kid and his gradual aging process.
edited 10th Feb '18 7:27:49 PM by TobiasDrake
My Tumblr. Currently side-by-side liveblogging Digimon Adventure, sub vs dub.That's just because Trunks changed history!
...
What? If Trunks's intervention can cause Dr. Gero to make more androids with shittier parts, it can explain this.
My Tumblr. Currently side-by-side liveblogging Digimon Adventure, sub vs dub.Future Trunks' arrival caused Vegeta and Bulma to have sex 1 day later, causing present Trunks to have slightly different genes. But seriously, present Gohan is 22 or so in the Future Trunks arc and Future Trunks is like 30.
<.< That's actually not unreasonable, now that I think about it.
The dire warning of the future that Trunks gave everyone put them into hard training mode for the next three years. While it can be presumed that Vegeta would have spent that time training anyway because of how he is, the warning from the future would still have impacted his behavior, Bulma's behavior, and potentially Yamcha's behavior which may or may not be relevant depending on the events of the three years between.
With the Butterfly Effect in motion, it's almost impossible that Vegeta and Bulma would have conceived Trunks at the exact same moment in the new timeline. In fact, I'd go so far as to call it unlikely that Vegeta would even have fertilized the same egg of Bulma's.
Present Trunks could be a wholly separate person entirely from Future Trunks; more akin to a temporal sibling spawned from the same parents than a parallel version of the same exact guy. It's possible that he has as much in common with Future Trunks genetically as Bra does.
edited 10th Feb '18 8:11:08 PM by TobiasDrake
My Tumblr. Currently side-by-side liveblogging Digimon Adventure, sub vs dub.Since Gohan's only half-Saiyan, he might not have inherited the genes for spontaneous growth spurt aging from his father, whereas Goten did. Trunks inherited them in one timeline but not the other.
Goku's the only pure-blooded Saiyan we've ever watched age over the course of the series.
edited 10th Feb '18 9:42:28 PM by TobiasDrake
My Tumblr. Currently side-by-side liveblogging Digimon Adventure, sub vs dub.End of Z Goten might have hit his growth spurt already.
My Tumblr. Currently side-by-side liveblogging Digimon Adventure, sub vs dub.Assuming that Saiyans remain childlike until they spontaneously hit a growth spurt that catches them up to a normal person's level of physical maturity, yes, Goten certainly would resemble a normal person after hitting his growth spurt.
It's the part before the growth spurt that makes it unusual. Like Goten and Trunks being 12 and 13 in Super, respectively, but still looking identical to when they were 7 and 8.
My Tumblr. Currently side-by-side liveblogging Digimon Adventure, sub vs dub.But he did get taller...around the 22nd Budokai.
Rules of the Internet 45. Rule 45 is a lie. Check out my art if you notice.At the 21st Tenkaichi Budokai, Goku gives us his age as 12 years old. He'd previously said he was 14, but Kame-sennin taught him how to count and he realized he'd been mistaken. Three years later, the 22nd occurs, followed immediately by the battle with Piccolo Daimao. At this time, Goku is 15. Then, three years later at the 23rd Tenkaichi Budokai, Goku is 18.
When Goku makes his wish for Pure Buu to be reincarnated, Goten is 7. When Goku meets Uub at the Tenkaichi Budokai, he's 10, indicating the length of time that has passed. Goten, therefore, is 17.
Thus, Epilogue Goten's age equivalent to Goku falls on the tail-end of Goku's offscreen training with God, during which he at some point matured to the adult body we see at the 23rd Tenkaichi Budokai.
edited 10th Feb '18 10:37:26 PM by TobiasDrake
My Tumblr. Currently side-by-side liveblogging Digimon Adventure, sub vs dub.Goku is 12 in the first arc. The 21st Budokai is 8 months later. The RRA arc has the dragon balls reactivated, so it must be one year after Goku was 12. Then we get a three year timeskip.
There are seven years between Cell and Boo. Given Goten's conception, and the dates given in the series, he's actually 6 at the 25th Budokai. Add ten years to that.
Both closest to 16.
edited 10th Feb '18 10:47:08 PM by Saiga

In the Goku Black saga, who is older, Gohan or Future Trunks?