The biggest difference to me is the overall talent on .net worlds versus .us.
On .us, there are either good, experienced players and tribes or terrible players and tribes. There isn't really an in between. There are good premades and mass recruit tribes. In mid to late game, the top 20 is made of the premades and the mass recruit tribes that just kick their inactive, low pointed players to replace with other people with points. Skill isn't really a requirement. Most good players are ridiculously cocky and won't admit that players have some ability but don't have skills as honed, but it's true.
On .net, though, there is a much bigger middle ground between the 2 ends. Obviously most tribes are still terrible mass recruit ones but some are made of not as active but skilled players or active but not as skilled players. These at least have some success.
That is the biggest thing I like about .net versus .us. But still, USA all the way