NurseyEU Snipers really don't hit anything more spectacular than NA Snipers do but EU Snipers tend to focus on staying alive and be super annoying by just staying alive (the amount of maps that become 100x more frustrating to push because someone is on sniper is so damn high). NA Snipers don't really focus on staying alive a lot and tend to use it as just a pick class, not as anything super annoying. They usually risk being in caught out positions more on the off chance they can catch out a medic or anything else.
This makes a lot of sense especially considering that the EU rule set encourages playing slower when up rounds. No better way to play slower than with a class that can shut down entire lanes of movement with its existence.