I have always liked Quaider's game. We all know he brings a ton of grit to the table. He's not flashy, but he quietly makes a lot of solid decisions with the puck. He's not going to be a major factor in the offensive zone, but he is solid in the defensive end. He's your classic stay-at-home d-man, and those guys still have value.
Now, that being said, there is certainly an argument to be made for Bart to play over Quaider when everyone is healthy, and that is not a knock on Quaider. I think Bart just continues to get better every game, and he can make plays with his skating ability that Quaider just can't make. Bart also brings some grit to the table, not Quaider-level grit, but he doesn't back down either. I think Quaider has reached his ceiling, where Bart's ceiling has still yet to be reached.
On this team, Quaider is a bottom-pairing d-man, but I do think on some teams he could potentially be a #4 d-man that you pair with a more offensive minded player. I think he could have some value out there. Miller has been solid so far, and I agree that their games are similar, but I want to see a bigger sample size before I cast off Quaider. Quaider is still cheap, and he is only one year older than Miller. I think both players could have some value at the deadline, but probably more Quaider because of his experience. But let's not forget that the Bruins have a great shot at winning THIS YEAR, and you often need 7, 8, even 9 quality d-men to help you get through the grind of the playoffs.
This defensive depth is a great problem to have for the Bs. Right now, I would favor Bart over Quaider and Quaider over Miller, but I also think that when everyone is healthy, Claude should look to rotate guys in and out to keep players fresh.