Emotiva: UPA-2 vs UPA-200?

I can't really find a clear answer about the difference between the UPA-2 and the UPA-200
There is a UPA-2 for $200 in my local Craigslist.....
RTiA5 + CSiA4 + Jamo SW410E
Yamaha TSR-700 (equivalent to RX V6A)
No surround...yet