I can't stop laughing at the "STD Legion", what did it have sex with an Onslaught lmao. (I get how the acronym makes sense but it's still unfortunate)
Anyways I think both of them are decent, one can have crazy burst, one is a bit more suited for lange range pew pew with guns, both have pros and cons. But at the end of the day both are capital battlecarriers which are a pain to outfit and put officers in. Not enough OP for usual stuff and officer will be weaker than in a specialized ship. Fun to use tho, especially in mid game.