The very extensive Boards UK magazine of last year found that Skinny s improved the performance of AMOST all sails.
Totaly agree with steveC take, and myself found some sails are better with a regular dia mast, especially 460 and above and for sure 490. The Reduced mast will hurt more when you get hit in the head (wear a helmet and laugh) sink faster, rig faster thru the mast sleeve. You will have to purchase skinny mast extensions.
HotSails Maui has the HotRod skinny, and Powerex are both very highly rated. If the size was 430 and below I would get the skinny, 460 above get as much carbon as you can afford. Some sail makers design for skinny (Ezzy) some say both will work.