Having a custom from the get go (semi anyway after about 40 different measurements) with my OS Systems HD Pro I don't think I could replace it with one from online or off the rack unless it fit perfectly. It was 1650 with light & heavy undergarments, relief zipper and commercial dry glove system. That was 2 years ago and I understand the price has gone up. But I have seen the difficulties encountered with suits that don't fit just right. As to make I really don't think it matters as long as the fit is correct, it has the features you need and want, and does what it's supposed to- keep you warm and dry. Bottom line fit, fit ,fit. Everything else is icing on the cake. And anysuit can be streamlined if it fits correctly. Dry suits by their nature will not be used to set speed records. To say one is more than another is not necessarily correct. A friend had a white's hybrid? trilam top, neoprene bottom. It is a custom and his fits him as well as mine does me. If at all possible unless you are a perfect fit go custom or even semi. It will be worth the money and time you spend waiting to get it.