Not really. I did the math in the past because I seriously considered moving to the US cuz I got an offer there. In my estimates, you would end up spending the same % of your salary in surviving, but of course the remaining let's say 30%, is simply a lot. Also a lot of things are not really that expensive (most things that are not housing, or maybe eating out.) And when you get out of the Junior level, I think the difference between SV and Europe becomes abysmal.

Also, "Europe" means many things. I am talking about Berlin here. I also know other places, like Madrid, where you just simply earn pennies in comparison so the difference becomes even higher (Madrid is more expensive than Berlin, earn less)

I still decided to stay here though (because of quality of living, work culture, music and partying, politics).