I can't give you any input them in a side by side comparison, but I can tell you that the RCA screen appears to have much more glare than the Samsung. Several of my friends in the market for a DLP TV have commented on this as well.
If I read some other posts correctly, Samsung is supposed to be correcting the aspect control problem with the HD931 DVI output. I am trying to confirm this with Samsung. Anyone else heard about this?