I was going to bring up this question but I wasn't sure if I should. I bought it for the xbox one because I've bought the other guitar hero games on the xbox 360 and I like to get the achievements. I'm assuming all of the same DLC is available on xbox one and ps4. I have no confirmation on any of this though. Many songs will be available on the disc, but there is a new online feature that lets you play the songs online. It's sort of a weird "on demand" feature. You have to play along with whatever song is playing on the channel. If you want to play the song again at your leisure, you will have to pay money for it. If you don't care what songs you play, you can play lots of different songs for free. Hopefully I'm explaining this alright. I'm pretty tired.
I just hope to God the visuals are the same on both consoles. If Microsoft had to skimp on the FPS or resolution for a music game, that would really be pathetic. I'm assuming we would have heard something about that. They shouldn't have to do that for music games. Same goes for racing games and fighting games, but who knows anymore.