I own a 2020 vision with the newer head (electronics seperate, cheap to repair/replace though I have never had a problem)
Said this many times but the main benefit to AP to me is the direct to market parts, no middle man. If you service your own gear AP is fantastic. The AP regs are great and service kits are cheap from them.
I also own a Alloy dpv Alloy is great but it does corrode and the anodising will get stripped if you get a caustic solution on it (rebreather). Galvanic corrosion can occur where you attach the backplate. The AP scrubber is plastic and isn’t subject to this (xccr also has a delrin scrubber), plastic is a better insulator for scrubber performance also.
Fmcl are great and breathes well. I have tried bmcl and will be sticking with fmcl but I’m pretty flexible so the clear chest is a mute point for me. Here is Richard Harris take on fmcl
The Megalodon CCR (and other thoughts by Harry) - The Wetmules
but that is all subjective. You are stuck using bmcl on jj
harness, JJ dominates. Harness on the AP works well and can trim the unit well with it but it just doesn’t look pretty.
temp stick, c02 sensor, dual controllers, fibre optic hud are all nice to haves in my opinion.
can’t get a radial scrubber in the AP but you can in the JJ and have a extended range scrubber also.
look into the Meg and xccr aswell imho. Good luck with your choice as either will be great fun.