Tipping the scales.

It's still debatable whether a Corsair actually has higher DPS than a Buccaneer at bosses like Zak and HT. No one has reported on how long Battleship lasts there. It's well known that Battleship Cannon and Bullseye are how Corsairs are able to output such high damage. However, without Cannon, they have to resort to Rapid Fire which sucks in comparison.

At bosses like Anego and maybe Bigfoot, there's no debate. Corsairs win for sure. At Zak, Pap, and HT it's debatable and a great deal of it depends on the level of the Corsair.