U2 - British or American? Which is your favorite English accent? Why?

I personally prefer the American one, I view the british accent as a quite difficult accent to ''use'' (use is not the word I want to use but I can't remember the one word so I'll let it be), its harder to speak and understand what people are saying to me. They say it very differently (an example is how british people say water) and when 7-year-old me tried to understand british accent while watching harry potter, I failed most completely. It was extremely hard to me, today I can do it easier but still not a super easy thing to do.