I have not tried that many different dry suits in the water, but any well made suit that uses good material and construction techniques should be fine. You can usually look at the suit and get a general idea about the quality of the workmanship.
The big difference is in fit. This is probably more important than minor quality differences between brands. If you can find a stock size that fits you just right, THAT will be the best suit. Sure there are design differences between brands, but if a suit does not fit well it will SUCK in the water.
Speaking only for myself I have a stock DUI CLx450 (old style zipper) size XL, and have also used a stock DUI TLS350 (new style zipper) size XL. On paper these suits should be the same fit, in reality the CLx450 is just a little tighter around the torso, this makes the 450 fit me noticeably better. It just has to do with the way the original patterns were cut, it is a known issue with the CLx450. For me it works to my advantage. I point this out to indicate that even slight differences in the way a suit is cut may make a difference for you. If I were a little larger the TLS350 might be a much better fit. Slight differences from one brand to another can have a huge impact on how a suit will fit your body.
Stay away from "Bi-laminate" materials and choose a "Tri-laminate" if your chosen material is that type and not one of the crushed or compressed neoprene suits. My CLx450 is a "Tri-laminate" with a thicker cordura outer layer, this makes the suit a little stiffer, but a little more abrasion resistant.
Get a suit that is appropriate for your diving and that fits you well and worry about the name on the shoulder patch later.
Mark Vlahos
