IMO they should do about the same DPS and the point of difference be maneuverability vs. tank
There does seem to be a discrepancy between Fed Cruisers and KDF battlecruisers
The KDF versions just seem so much better with the ability to use dual can's and the extra turn rate the ships have. You can get KDF cruisers with 11 base turn? and the best you can do fed side is 8? It's actually quite a big gap.
Hard to gauge how much of the problem is to do with beam energy usage, but it does seem like a real issue. It seems to me like beams vs. cannons is balanced fairly well in terms of damage vs arc but the extra energy drain on beams just makes cannons that much better.
I find it funny on some cruisers with crews in the thousands, have less tactically than a ship with less than a hundred.
And KDF cruisers are so much worse than Feds. Nothing even close to the adaptability of the Excelsior, Ambassador etc..
I think we only have one that's halfway decent. And Feds will have access to their Tier V shipyards waaaay before any KDF fleet does.
So yea, KDF cruisers turn faster, and do way less damage.