If you want to compare, you should make the cutoff be based on net worth, not simply take the top 10. Then you also get eBay, Tesla/SpaceX, Salesforce, LinkedIn, Yahoo, and Square/Twitter among others.
I was more interested if younger successful founders in the US faster take-over older founders. And they don't. A large part of the wealth of the older founders has been acquired past-IPO.
The conclusion (for me) is that to make it into the top 10 (whether US or Europe) and stay there, you gotta grow a company successfully for many years, like Microsoft, Oracle or Apple did in the US and SAP did in Europe.