I have two Repros, one with a single trigger, one with doubles, one with a splinter and one with a beavertail. My RBL has all the bells and whistles.
The RBL action uses the default A&D action, which is what, as old a design as the Parker? The Parker, like most American guns, started with a clean sheet of paper. Both work very well and it would be silly to argue otherwise. The Parker single triggers usually work, some don't. Mine does, and I will give the nod to the Parker single trigger for the better feel, any way you want to describe it.
The RBl has tubes - that's hard to trump. Oh, and 28" barrels. But the RBL also has a puffed up trigger guard (you know what I'm talking about) and a frumpy beavertail with a so-so fit (at least every one I've seen - what's with fitting the fore-end?). The Parker is simply sleek in any configuration, well fit and finished.
Parker stocks are kind of a grab bag. I am of the impression they were individually made, so you pays your money and takes your chances. The RBLs seem shootable, no matter what.
After all that, I rather like the Parker best, but the RBL is no slouch.
