Serious answer here:
I just bought two new pairs of my usual Asics Cumulus, one in white/red and one in black. I usually buy them in white/whatever, never had a black pair before. The white/whatever pairs have layers of colour on the sole which help me to gauge the amount of wear to my shoes - when I've worn through the coloured bit to the darker bit underneath, it's time to replace them. But teh balck pair have solid black soles, which is going to make judging the wear and tear a bit more difficult.
Apart from that, I haven't noticed any difference between the two pairs on especially hot or cold days. I do like the way that the black ones don't show up the dirt though! 
Edited: 03/04/2012 at 09:06