Since Sega Europe are still only thinking about releasing Project Diva X here, I was thinking of getting Future Tone while I wait to see what happens but I'm confused about how that game is being released.
I can't see it on any import sites so is it download only? And I remember hearing when it was first announced that it was getting split up into two games, is that the case or is it just one game then you buy the other songs as DLC?
Yeah, it's Digital Only. So you'll need to have/make a Japanese account (not too hard, Google has a lot of guides on it) and then buy JPY PSN Cards from an online retailer to buy it.
Someone correct me if I'm wrong, but I believe the game's "main app" is downloaded for free (Future Tone Prelude). That has two free songs. From there, you can then buy two separate DLC packs:
Future Sound, and
Colorful Tone. These are the two games you're thinking of. Each one has something like 100+ songs and loads of modules from two different types/eras of Project Diva. Where Future Sound is the more modern stuff, and Colorful Tone is Project Mirai + Arcade songs.
So basically:
Download Prelude for free
Purchase song pack from within Prelude as DLC; song packs are entire games for all purposes
Because it's DLC in the game you won't have to switch between two different games every time you want to play a song from the other pack.
....which is why I really hope I got that right. Pretty certain they're not two separate apps.
[Edited what pack is what, made a goof-up in first draft.]