Which song would you rather hear ? Both are rock classics from the same era, perhaps they could be described as musical cliches. But I'd much rather listen to All Right Now. For a 1970 song, it was ahead of its time and has stood the test of time. Paul Rodgers' vocals are excellent and there is a great guitar solo that builds from nowhere.
Layla, whilst unquestionably a good song, just doesn't do it for me. Ironically, it will likely be Eric Clapton's most high-profile legacy.