@Cammy3761
This is a generic response first.
Backplates are generally just backplates. As explained to me by the owner/founder of Helium Dive Gear, the main cost differentiator is time on the machine, as steel and aluminum are cheap. How well rounded are the edges? There's also the finish. Deep 6 made the most beautiful backplates before Covid killed one of their suppliers. If someone is very tall or short, they may want to look into Halcyon as I don't know anyone else who makes tall/short backplates.
For cold water drysuit diving, you may want to consider the 10lb bp from subgravity. For my rebreather, I like subgravity's adjustable harness, though I can't mount backup lights to it the way I can with a single piece of webbing.
Halcyon makes the best webbing in terms of durability and "just right" stiffness, but I still go with webbing from my local fabric story or DGX for Hogarthian harnesses. I don't have enough time with the Deep 6 harness to judge its durability (absorbs less water, so I suspect it will last much longer, but that is a guess only).
Wings all depend on the quality of the bladder and the protective fabric.
To your question. OMS makes perfectly good wings. The red to me is heinous, but other people like it. No one should care what my aesthetic tastes are but me.
From just cursory glances, the wings seem to be covered with a durable material.
In general people are happy with the gear they buy.