Awesome Music: The best part of Dracula X Chronicles is that you can set any song in the game, either original or unlockable, to play in any stage or fight you want, with the exception of the fight with Dracula (except in the PAL version). Who doesn't like the idea of using "Bloody Tears" as the boss theme, or using the previously unused remix of "Cross Your Heart" as a stage-theme?
Polished Port: Along with a new final boss phase, a revamped live soundtrack, a completed version of the secret stage, and the ability to swap tracks from either version along with Symphony of the Night in any stage, the game includes the original game with cutsenes dubbed by the cast of the remake for the first time in English. Along with these changes, there's a fully intact port of Symphony that's been redubbed with a slightly revised script and includes Maria both in a new boss fight against Alucard in the clock tower and now playable with her Rondo moveset. Plus, the Faerie's song is sung in English.
Fans of the original may be disappointed you have to find the item in the 3D version first before you can unlock the PC-Engine game.
While remixing the soundtrack for the remake, they took out "Den", the Clock Tower theme unique to Rondo, and inserted "Moon Fight" from Castlevania Chronicles in its place. The original version of "Den" is still available, along with a remixed version called "Cavern of Dark Spawn", which you can only unlock from Boss Rush Mode, but this decision remains a odd one.