DVI single link vs dual link

is there really a difference between single link and dual link DVI? i see that physically that there's more pins on dual link but will i even see any difference?

use the google man :]

Dual-link connections provide bandwidth for resolutions up to 2048 x 1536p.

single-link connection supports resolutions of over 1920 x 1080 at 60 Hz (HDTV).

aside from that i didnt see anything that would suggest lower quality.

i've read many things on google about it, but i was wondering if anyone had experience with it and if they noticed anything