Transparent Reference vs Reference w/ XL


I have a pair of older version Musicwave Reference speaker cables. Has anyone compared this version with the newer Reference with XL. I love these cables. Is newer always better??
pals
Krocdoc, have you compared Ultra with XL to without? I have a pair and was considering having them upgraded to XL status and was wandering if you thought it would be worth the 300 bucks? thanks in advance.
No money, I have not heard the Ultra vs Ultra XL speaker cables. I do however know someone who had an Ultra balanced 1M and a Ultra with XL balanced cable, and he felt there was not much difference between the two.
Actually I was talking about I.C's, sorry should have clarified that. They are single ended but this does at least give me an idea. Thanks for the reply.