Oh to add, both radios work fine in simplex mode, GMRS to HAM versions Set to GMRS mode, I can send and receive on both. It's when I go to Duplex (repeater mode) the HAM version set to GMRS mode just will not transmit. Ive even had my SDR set to the channel, monitoring it... and I get nothing.
I would like to invite others with both versions to try, IMHO there is a very subtle difference between the two versions, which was in response to the initial question.