I don't know, Fran... there's a bunch of stuff in the E80 that's not in the G70, and most of what's in the G70 but NOT in the E80 is legacy Canvas sounds, which used little ROM.

Think TWO more pianos, for starters. Natural and Superior. Both sound as detailed as the G70's GrandX, which was reported to be 64MB alone...

You can download the Style Converter software for free from Roland... I did, to see if there's a manual. There's only the sketchiest of a Quick Start pdf, that shows how distressingly bare bones the software is...

There is no header editing of any kind. You merely import SMF's for each section of the style, tell it how long each Division is, and it stitches them together for you. Bare bones indeed...