It’s very good. Bar the first season and last … 3?

Different take entirely. For those unaware the UK version is so cynical and on occasion even dark (and i love it for that) and in contrast the US version is more light hearted and succeeds completely on those terms.

Both are landmarks in tv comedy.

It's a very different show. The pilot is note-for-note the UK show, but they quickly realized that Steve Carell can't play Ricky Gervais; he's just not enough of an asshole. So they recalibrated. I think the US version in its heyday is the better of the two shows.

Greg Daniels was the showrunner for the first 4 seasons; he's Peak Simpsons, and also King Of The Hill.