I don't know about that word "Custom" but I have a SA Loaded Champion.
When I first started using it, I was dissatisfied with its poor accuracy. I should have kept it as is, because I complained to SA and they installed a match barrel in it. Nice, huh? Well, it shoots great, but it wasn't reliable until I get a much smaller barrel link...they installed on that was WAY too long. Lock-up is a little to tight still.
The recoil spring must be extremely heavy on the Champion to make it work right, which is a PITA compared to a full-size.
Assuming you're carrying IWB, there's no difference in concealability between the Champion and a full size.
I finally decided to switch to a full size and I'm much happier about it. I don't think I'll sell my Champion any time soon, though.
Someday I'll learn to type.