Re: What if?
Depends how connected they are, our brains have two interconnected hemispheres which apparently have different ways of responding to stimuli, enabling us to both focus intensely on a eye hand coordination task like tying a knot while listening for predators. In theory two highly connected brains would share enough information that their sense of self would become distributed, however with two independent bodies I imagine this sense of self would be more sophisticated than our own, the idea of individuality would be very confusing, a kind of adaptive MPD could occur.
In the more specific case of RF communication which can be interrupted or lack sufficient range to maintain a connection individual personalities may develop if they aren't sharing all their experiences, which could get very ugly, if they develop independent concepts of self then they may try to dominate/manipulate each other, the struggle for control resulting in psychological trauma for the both of them.
Then there's feedback loops to consider, they could become incredibly lovey-dovey and codependent, or as I suspect is more likely their conflicting individuality will send them into an irrational and murderous rage at each other whenever they're in RF communications range.
It would be interesting to have them interact with RF blocking helmets on then see if they can maintain civil composure when the helmets are removed.
and if they are truly far gone they'll be drooling in a cup either way. 
