Guppy, I dunno about that... The end results may be the same but different groups go about things entirely different.
Example: I've been flying as a knight for a while now. My observations here are not intended as a slight to any given pilot, but are a general observation of the other teams I've seen.
Bish are more skilled in general at fighting. They will actively engage in fights and what have you. When they run missions they are usually small coordinated pork-fests, meant to milkrun rear bases for better shock value. These missions are easily stopped if anybody gets up off their arse and just ups so much as 1 plane to take them on (don't have to kill them just disrupt their plans).
Rooks are less skilled in general at fighting and avoid it at all costs. Rooks (by far, more so than bish) will come in at 20k in hordes of the same plane, dive to the deck, drop all ord they had on a field, make 2-3 very high speed vulch passes (ignoring the 25+ fighters in the area that are actually capapble of fighting back) then run for home in high-speed late war planes. Most rooks don't fight well if you catch them. Most rooks will suicidally swarm a field close to their front lines with 100+ of their own and just horde the hell out of it. After 20 minutes of vulching and all porkable things being killed, somebody might bring a goon in (maybe) and take the field, but the fight's already spilled over to the next closest field. So they just progress one at a time linearly, whichever way the vulching leads them.
Going back to the comment about knights ignoring the rook front: Maybe it's because the real fight is on the bish front? I know for me I prefer the bish front because they actually fight back.
Again, total generalization, but whenever I'm on the rook front the enemy just runs in, dives down, runs out, never letting themselves get into any danger. The bish on the other hand really can be annoying with the horde-running (like ack-running). I can't speak for the knights, as I'm in that group. I know we're disorganized as a whole and rarely have the numbers or the desire to win the reset, but we often get perk multipliers of 2.5x because we're outnumbered so badly! That might just be worth it! (naaah... but it's some consolation regardless)