As an European I can't say how well it compares to the US but The Netherlands (Amsterdam in particular) are an amazing place to move to.
I've left Italy a few months ago and moved to Amsterdam (studying and working), it's an amazing place, a massive change of settings for me. There are lots of startups, companies and opportunities for tech-minded people. Obviously, I repeat, my comparison is with Italy which, to be honest, is one of the worst places you'd want to found a startup in Europe.
Along those lines, check out this link: http://appsterdam.rs . I've heard Mike Lee give a pitch on why geeks should move to Amsterdam, and it sounded pretty awesome.
Amsterdam and environs is an exceptionally good location for internet startups due to the massive cheap bandwidth available there (datacenters are expensive though).
I've left Italy a few months ago and moved to Amsterdam (studying and working), it's an amazing place, a massive change of settings for me. There are lots of startups, companies and opportunities for tech-minded people. Obviously, I repeat, my comparison is with Italy which, to be honest, is one of the worst places you'd want to found a startup in Europe.