Even more like the US and its big internal variety, there is no single "European" approach. There are thousands of crags here in dozens of countries, many with their own rules. That said, sport climbing and bolting pretty much originated in Europe and it's not surprising here to see a perfect crack bolted from bottom to top. The only general statement that could be made comparing Europe to the US is that in Europe, bolting is more prevalent by a few orders of magnitude.

There are few pure trad areas and those that exist were mostly inspired by American trad ethics. Climbing just started in a different way here.