yes and no, especially bar specific strength, technique and leverages matter a lot pulling that's not so much strength related. look at someone like richard hawthorne or even steph cohen, you wouldnt call them stronger than you right? but they can smoke your deadlift
True.
Strength has a lot to do with leverage and technique. I know guys who don't look like they even lift that can deadlift 500 pounds easily.
I've seen 5'3" 155 pound power lifters pull 700, they are short and compact, with proper training deadlifts are easy for them. I've seen 6'+ 250+ pound guys struggle to deadlift 400 pounds, mainly due to having long legs.
Without going into a huge wall of text, training for strength in the 1RM is completely different than trying to gain muscle mass, but yes they both go hand in hand to a certain extent. At my biggest, i could deadlift 585 for 2-3 reps on a good day. At my strongest i could do a double with 660. When i was into power lifting, my legs and chest were not nearly as big as when i was bodybuilding. It was amazing to see how my body changed over a 2-3 year period when i switched from bodybuilding to power lifting. I still looked generally the same, but my arms, legs and chest actually got smaller, however my strength was on another level.
The first thing i was taught when i got into power lifting seriously was that if you want a big deadlift, you need to have a big squat. I had to learn how to sit back on my heels, drive with my legs and hips, rather than just trying to lift it with my back. You learn to be like a piston in an engine, not just a big dude trying to yank a weight off the floor.