they both look great. the advans have a very provacative spoke curve so i like that better on a Z. one of the main reasons why i got the weds on my car was the real curvy spokes.
the other reason was Weds is one of the very few (besides TSW/Forgestar custom) that offer the correct front offset for the car... ET32-38 especially for stock height... and light weight. .... and my buddy alex at tirerack has them and the tires i wanted... lol too many good reasons.