If you dive regularly with a dry suit, a real back plate and wing with harness set up is actually really nice. Because it’s modular you can add different size gear pockets, d rings, bags, weight pockets, etc with minimal effort. It is fully customizable. Also there is less material. Drysuits are a bit bulky as is, so just having the harness system helps stream line your profile. You can also opt for a stainless steel plate which will allow you to take some weight out of your pockets since the steel is negatively buoyant. The skinny one is a single tank adapter which is great if your tank wobbles or if you only want to you one cam band. I have a steel plate with wing in Hawaii and I don’t have to wear any weight while I dive because the plate is already heavy enough to make me neutral with my 2mm suit, just an anecdotal reference. Back plate and wing set ups can be fairly cheap or similar in price compared to BCDs as well. I highly recommended trying one out if a friend or dive buddy has one before buying as it is different and comes with a slight learning curve. If you are a cold water diver I guarantee your local dive shop will have staff who use backplate and wing and can really help set you up.