It really doesn't.
It has more aggressive regulations on additives, but the big question is if those lead to higher quality food in the end. That assertion is rather dubious.
I would argue that the vast majority of EU regulations on additives are really just a form of economic protectionism, and don't actually lead to measurable improvements in food quality. American farming practices can churn out shittons of high quality, nutritious, tasty food and european farms can't remotely compete with that. So they ban foods produced with a lot of the technologies we use in the US.
But the actual scientific evidence behind most of those bans is basically non-existent.
Edit: Consider how California's goofy regulations mean like basically everything that is going to be sold in California needs to have a "this product contains blah blah blah which is known to the state of California to maybe cause cancer" sticker. That's what the EU is like. Largely to protect their own industries, rather than protect the health of their citizens.
