We have good "defensive" metrics, but that's only because we don't have to play a lot of defense. When we are forced to defend, we are pretty poor, especially Hamilton, Severson, and Smith. Siegenthaler was playing excellent defense earlier in the year but has fallen off a fair amount. Graves is pretty meh. Bahl has shown some decent flashes. Marino is easily our most reliable defender. Luckily we'll have Luke Hughes joining before the playoffs.
I like the Rangers defensive core over the Devils in terms of being able to defend and break the puck out under pressure. Fox, Lindgren, Miller, Trouba, and Schneider are all fairly reliable.