The UK version was fairly short but hit all the high points pretty well. The US version had several more seasons and had more opportunities to build characters

The UK version was fairly short but hit all the high points pretty well. The US version had several more seasons and had more opportunities to build characters and explore ideas, which worked until around Season 5-6. The later seasons of the US edition had their moments, but were clearly running out of steam. Cue the inevitable Ribbonfarm link in 3... 2... 1...