I don't really think the two bands compare. I like both. But they each have different styles and serve different needs/moods. Rush is better for pure rock and roll but Pink Floyd is far more genus with lyrics and concepts. I have a near full library of both on my iPhone.
Can't compare. Different styles and even though some Pink Floyd could fall into the prog-rock category I never really considered them a prog-rock band like Rush was for most of their career.