The defensemen aren't as talented, but its a quality group of players. McCarthy and Thrun are the two best, in my opinion. Very similar players from what I've seen. Both have decent size and defend well. They also are good skaters and rather smart. Not the best offensive players, but not without any offense, either. Warren is a close third. Good in all three zones. A little undersized, but more skilled than McCarthy and Thrun. York looked like a mobile puck mover who brings the most offense to this defense group, although I don't think he's incredibly dynamic offensively, more of a puck mover than OFD. He's slight in size, as well. I think all four are rather close in ability, all four are quality players. I would peg their draft range as late firsts to second round picks for the 2019 draft. The other two defensemen in this 6 are good, just not as good.
Fensore is a puck carrying defenseman who skates very well and is underrated defensively, but he's like 5'6. He probably will be drafted, and he's pretty good, I just don't think a 5'6 defenseman is going in the top few rounds. Vlasic is the biggest defenseman on the group of defensemen. I'm not sure about his mobility, its not very good. He has some ability to move the puck and isn't without skill. He's similar to Adam Samuelsson from the NTDP-18 team.