I don't see any value in Roland UK's figures. G70 is expressed in MB, E60 in Mb. I don't think even Roland know exactly what they are talking about. (big surprise!)

According to their figures, the G70 has 192MB wave ROM, and the E60 has 64MB (512Mb).

Strangely, the E60 has THREE great pianos in it, G70 just the one. The GrandX alone in the G70 was reported to be 64MB by itself! I fail to see how, with the E60's nearly similar soundset, that the G70 has three times the ROM. From what I have heard on demos, they certainly sound pretty similar on much stuff...

So, all in all, not much of a big deal. I guess it's kind of like brake horse power... Sure, there's a figure out there, but it doesn't tell you much about how the car DRIVES...

BTW, for anyone still confused about Mb vs. MB, a simple Wiki search should get you straightened out