Interestingly enough, I recently finished watching the first season of the Swedish original (titled Real Humans), and I'm slowly tinkering with a piece on it. To put it succinctly, I didn't like the Swedish version as much as I did the AMC one, and I couldn't quite hit the nail on the head as to the particulars. Some of it is tone (the Swedish one is a bit darker, maybe even a bit seedier, and a tad more "adult," for lack of a better term), but it's also hounded by its own politics in the last few hours. The performances are quite good, nonetheless, and the similarities to the AMC interpretation are strong enough that I suspect most viewers would probably 'dig' it. A few of the characters don't "translate" over as strongly as do their counterparts on AMC, but (again) those are minor quibbles when evaluating the length and breadth of the story.
Still, if you're hokey-dokey with subtitles, then maybe pick up a copy on DVD if you're inclined. Science Fiction fans would probably appreciate what the Swedes accomplish with great ease (effects work are much more practical and in-camera). Plus, the subplots left out of the Americanized version do give the audience a bit more to think about when the challenge of integrating artificial intelligence into our already messy existence is taken a bit too casually.
As always, thanks for reading ... and live long and prosper!