The Clash or The Ramones? Honestly, I don't know. I'd never been able to answer, no matter how many times I've been asked before. Odds are you've been asked this, too. I could go by the old argument here and say something like they're two different bands (and they are) and they did different things with their music (and they did), blah blah blah, but apparently, that's not definitive enough for some people. There are people out there who feel like a serious music lover should and would make a choice. They ask this question as if it were a question, indeed the question, definitive article there, that speaks to all about your musical tastes. Is it really all that controversial? Has it ever really split a room? Did it ever cause any, erm, rrrrrrriots?
I think I can safely say that I have listened to a lot of both bands. In my younger years, I had dedicated a summer to each band. Summer of 1990, The Clash. Summer of 1991, The Ramones. Some say it's a battle between mind-rocking fun (The Ramones) and food for thought (The Clash). I think both bands were capable of both.
So I guess it's not so much a battle of music or musicianship but a battle of experience and memory. You can like both, in fact, if you're a fan of one you're probably a fan of the other. But most likely you discovered one first or feel closer or more attached to one. In my case, I did immediately love Blitzkrieg Bop and Today your Love, Tomorrow the World when I first heard them. Hey, how could you not? But I think it was that summer of 1990 that I sat in my room, completely blown away by the song London Calling.