Devblog concept art comparison

"Both factions' infantry boats are their anti-air and anti-infantry options, providing the dual use of defending ships from air attack, while also being able to threaten the crews of other ships. The Colonial boat took on an armoured speed boat look, while the Warden boat ended up with the look of a heavy picket ship. The Warden boat, designed by our latest artist Steve, was meant to look like it can take hits. The boat also originally had an additional function on top of the anti-air turret. The scope of the new boat pitches was expansive, and there are a few things we have not been able to share yet."

Source

In addition to the hilarious concept art disparity (which might have been cherry picked) devman wanted to give the Warden boat an additional rocket platform. I don't see why not, Steve definitely did a good job there.