
Fortunately, John Phillips over at Off The Telly seems to have comparable thoughts to my own, so I recommend you read his excellent, well-reasoned comparison here.
To summarise my own thoughts on The US Office, in a paragraph: I really like what they're doing with Jim/Pam, appreciate the wise decision for Michael to not be a Brent clone, I think their expanded cast works quite well, I generally hate the amount of times they leave the office (as it's usually forced and unlikely), I detest Dwight (a misfiring one-dimensional cartoon), I cringe at the sillier moments they shoehorn into scripts, and it bugs me when the conceit of a documentary crew filming them for TV is blatantly ignored – and it just becomes a "filming style".