You could experience the same problem with both both station combinations.

You could get a

MX900 & MRF350 for room 1
MX900i and MRF350i for room 2.

Or 880z's as I mentioned before. You can get 2 880z's without worry of crosstalk.

This "cross talk" I'm mentioning would not happen often, but when it does, it's annoying.