I've got a book about venetian painting which contrasts these two paintings, by Raphael and Titian, to show the difference between Florentine and Venetian painting.
I should type it up in here cos it's quite interesting. It's all to do with how light falls on solid and monumental forms in the Raphael, spotlighting them to show them as clearly as possible, whereas in the Titian, light doesn't fall on all the figures evenly, the light (and by extension colour) is what the painting is really composed of.
See I can't explain it properly. I'll type the passage in here some day.