Some fans, at least, sure don’t like to compare “Battlestar Galactica” with Star Trek.”One is a space drama, one is a space opera. STOP COMPARING THEM PEOPLE,” one such fan wrote on the TrekFanUnited message board. “Each is BRILLIANT in it’s own right, but comparing these two is like comparing ST to Star Wars…….there IS no comparison. They are to [sic] different in intent and scope to be compared.”Despite the warning, I’m going to plunge ahead and compare them anyway because in the most important way possible, the two series share a common bond.Without a doubt, the series have their differences, and no one’s expecting a “Battlestar” episode in which a Klingon battlecruiser pulls up alongside the Galactica. (Although, when asked, BSG showrunner Ron Moore said a BSG/Trek crossover would be …