The Office UK is one of my favorite shows of all-time but doesn't hold up as well as one would think. It's high points are absolutely amazing but there are a bunch of scenes in there which lead nowhere and are condescending. (David selling janitorial supplies, for one.) Extras bored me to tears.
The Office US trumps the original. They framed the plot better. The thing that always bothered me was how David got his job when it showed him as having no talents whatsoever. He was a buffoon, whereas Michael Scott had some savant like powers in sales and, despite his glaring social flaws, was an effective manager.