Koni red vs black shock absorbers: any difference?

[GGR]

Hi all,

I'm looking around for adjustable konis for my '71 280SL. I noted that there were the red type available, ref 80-1415 for the front, and 80-1416 for the rear. They are slightly above $100 each. Then there are the black "Classic" ones, roughly 1,5 times the price of the red ones. Apart from the color, are there any difference between the two?

Thanks!

[nahuston]

Don't hold me to this but I think that the reds are valved firmer than the blacks but not as stiff as the yellows (sports). I was also under the impression that they were no longer in production so the better price may be due to a supplier trying to eliminate old stock?