They both star Rolf Lassgård. He will be unfamiliar to nearly all American movie-goers I'd guess. He came to my attention when I sought out the Wallander detective movies. He was the first in that role, later followed up by another Swede, Krister Henriksson, and then Kenneth Branagh. They're all good.
Lassgård is an unconventional leading man. He's a big guy, pretty heavy-set, his hair is often long and not in place. He doesn't dress in a spiffy style. He's more like a big bear. He might have some stubble or more. His acting range is broad. He can be very friendly or very cool and distant. He can be calm or show a lot of anger. He can be easy-going or insistent. This guy is good. I've given a very imperfect picture of him, just so you don't expect a Bogart or a Mitchum or a Dick Powell. Lionel Barrymore might be closer to it. He's now 60 years old.
The Swedish movies of this detective ilk can all be classified as neo-noir, but that label doesn't add much. What they typically show is very good writing that integrates personal, family and social issues. The casts are uniformly strong. The story-telling and characters always seem to shed light on Swedish ways, and that adds interest.