I guess the question is: Where is the resemblance between November Rain and Bed of Roses.
I can see some to be honest...Richie on the mountain (Jon had done it already though) looking a bit like Slash in the desert. Jon in the desert looking a bit like Slash in the desert :P The bar scenes, Jon playing the piano. But there is no real concept in the Bed of Roses clip whereas November Rain is all philosophical and stuff. So, I guess the similarities are more in terms of imagery.

If there was a video I'd have to pick, it'd be Good Guys Don't always Wear White though. That one just screams Guns N' Roses somehow.

Simon might be right with the 'Zeitgeist' bit. Maybe it was time for a real ROCK infusion into the commercial metal scene around 87-88. Jovi saw it and pressed the 'blues' button. GnR just took it way beyond that.