Emu XL-7 & MP-7 User's Group

Hello , I'm planing to buy the ZR rom-card because I need a good GM
bank ;
but  somebody  wrote here that the sounds were not so good compared to
those of the Proteus 2500 ..can you describe the difference in quality
between those two (as I've also read that the sounds of the
Proteus2500 are to be sold as a new rom-card ) ? Does the Proteus have
the GM capability ?