As far as not being able to "see" the difference between a Brown and a Baer.... well you need to shoot one. If you can't feel the difference when shooting, then its not worth it.
Brown's are fitted nicer. They should be as they cost more. Pull the slide off and look inside. You can see a lot of differences.
I have a unique opportunity for comparison - I have a Baer Stinger and a Brown "Stinger" made on a Baer frame. The SN's are 10 ticks apart. They are essentially the same gun just one built by Baer and one built by Brown.
I consistently shoot the Brown more accurately and faster. And if you compare the guns side by side you'll find better fitting on the Brown across the board. Better trigger, shorter reset, a touch smoother (the Brown is a little looser), and the Brown is more reliable.
Like I said, so what, it should be better cause it costs more. The question of whether or not it is worth the extra cash is up to you. But the gun is demonstrably better in my hands.
You should also check out the Kobra. It is a lot of gun for 1700 or so, and all you give up is some finish work compared to a Limited.
As far as the "designer" thing goes, I don't think so. I just don't care whose name is on it. All I care about is how it shoots and in my experience, the Brown is noticeably better.
If you are really value driven, the Rock Rivers are the best value out there. You just have to wait a year or so. See my post above. The great thing here is that there is a full spectrum of guns available at varying price points with varying degrees of refinement.