Well seeing how no one else answered....I dunno. What do the Phase Cannons look like when firing? I only catch the beams, and the Waves. (and the things that causes Splash damage, lol)

? You can check whether or not vorarstra has PMs by seeing if it damages hull when it still has shields. It does, so it has phase missiles.

If you remember older versions of Rebellion, the Vorastra had some weapon types unique to it, including a so called "Phase Cannon". However, this was changed to be the "Phase Missile" weapon type for gameplay purposes because there was no research for phase cannons, thus allowing the phase cannon weapon to share the phase missile's shield bypass buff. That is why the Vorasta has phase missiles on the infocard but has a different particle effect for firing them.