I'm not in the EU, but when I see something that is US only, I tend to assume its doing something with privacy/user data/otherwise that is restricted in the EU.

Which means I generally avoid things that are not EU available even if they are available to me. Its not 100% but its a fairly decent measure of how much companies care about users to ensure they meet EU privacy laws from the start, vs if they provide some limited version or delayed version to the EU.