Diki,
Roland E-60 ROM size is 64 Mb (Megabit-s) not MB (Megabyte-s) as you wrote. So it is half the size of Sonic Cell, and quarter of GW-8 ROM.
Roland G-70 have 192 MB, and E-80 have 128 MB of wave ROM.
[This message has been edited by kalimero (edited 10-17-2008).]