Sure there will be lots of hypotheses for why this is the case. In my experience, though, you can almost ignore longevity and just look at these sociological differences that make the quality of life better for the English:

1. You could easily argue that frequenting a pub shortens your lifespan, but I just loved "pub culture" when I visited colleagues in England. It's a great antidote to loneliness.

2. You can argue all you want that the NHS has loads of problems, but even some rich people in the US, when faced with serious medical issues, their first thought is "will this bankrupt me" or "will I get hit with a giant unexpected medical bill"? Our healthcare system in the US is simply indefensible.

3. Cities and towns in England are just much more walkable, "congenial" in general, e.g. row houses instead of separate, fenced off suburban houses with yards in the US.