It's not a secret, I don't like Parker Repros. I had one of the single trigger guns that never worked and it cost me a lot of money before I dumped it. So, don't expect an objective opinion.
It is mind boggling to me that the Parker Repros have gone up the way they have. This makes the RBL an even better a choice.
The RBL is an American gun which has value to me. It has modern dimensions which means the gun will fit most shooters and you have two choices for L.O.P.. Many of the features built into this gun including coated (hard gold) internal parts are never mentioned and certainly not found in a Repro. It has real case-hardening that will last, a good stock finish, and a many options found only on custom guns.
How about product service? If anything goes wrong with a Repro, good luck! An RBL can be shipped back to CSMC and, often, you will have a one day turnaround.
I'm a hunter and clay target shooter. I demand guns that fit and that are dependable. The choice, for me, is easy. If they ever stop making RBL's, you will see the price go through the roof. Until then, enjoy a great American made SxS at an affordable price.