I hang out at both places
Flying Scotsman,
I don't think exposing anyone to the other board would drive them away. I regularly haunt four different sets of boards.
However, I stand by my statement that RC Universe is as anti-electric as EZone is anti-slimer based on the number of "Why would you want to mess with electrics/slimers? posts you would get on either board.
Its not the boards, but the most vocal group of users that causes the perceived bias.
I personally dislike the zealotry that pervades this hobby. Just say ARF vs. KIT and you'll see what I mean.
Finally, having outfitted both electric and gas planes, its two almost entire different sets of stuff, except for the radio. Both are about equally expensive as well. HOWEVER, both are just as fun, but in a somewhat different way.
GB