That BH gunboat does look pretty cool. It fits in with the BH fighters more than the capships, but that's a good thing.
Old Rogue Gunboat could be renamed the Molly Gunboat... It's only sold on a Molly base, anyway. But since the new gunboat is thematically closer to the Wolfhound series of ships (which are "generic" pirate fighters, even if they're really Rogue/Molly), I'd say make the gunboat more generic as well. 'Rogue Gunboat' isn't a very inventive name. I would suggest calling it the 'Fenris' or 'Fenrir' (after the mythological Norse wolf), but I think I've already suggested that name to some other ship... I think it was a generic pirate bomber, but I'm not sure what ever came of that.