there are differences. like you can't really say fuck on amc, except for the once a season thing breaking bad and mad men does, and it's muted -- but you can say it on the OG killing. and at the start of the episode, when that female blowup doll (with underwear on, so redundant) surprises main lady, it was a male blowup doll with a giant erection.
main thing is the OG version is 20 episodes long and as a result is probably even slower than what we saw. also the leading actress is better, imo. like already on amc's version i favour the new guy because the woman irritates me.
and apparently they changed the ending, like the identity of the killer.