i haven't seen the Razor in the sun, but for my D4 I have to take off my sunglasses to see the screen in the sunlight. I don't remember doing that with my D2.
I was underthe impression that they had nearly identical screens. I've heard the MAXX has a better screen in the sun than other phones on the same tier. But that it's still not as good as the older phones were in the sun.
So I'd say they both somewhat suck the same amount.