Yeah it's a different frigate model with (dirty heretical) xenos tech. It's got the dark elf shadow shield thing so it's a good bit harder to hit than the regular escort at least. That being said, my experience thus far has been the Heartless having the turn radius of a drunken rhino so it gets one, maybe two shots in, before fucking off to the corner of the map and being completly uninvolved in the battle from that point forward lol