How Good They Look
Composite windows definitely look nicer than vinyl. Because composite materials can typically be painted, most manufacturers make composites that have nice looking exterior and interior colors and or finishes. The finish can add some nice visual interest to the windows that outshines the look of vinyl. It's not to say that vinyl windows are bad looking, more that they are rather plain looking, even when ordered in an interior and or exterior color other than white.
The Winner: Composites Are Nicer Looking