Akai S1000 / S1100 samplers

I have the later 4.40 version in my bootup roms which is pretty nice 
but I cannot find anything about any differences between the versions? 
All manuals are for 2.00 that I can find. No big deal but if there are 
some cool addedd things in 4.40 it would be nice to know. 

thanks, 

Kiira