My experience on reds vs browns:
My first mech keyboard was a Leopold Otaku Tenkeyless browns back in March or whenever Elitekeyboards first got them (after lurking around for several months when I was first made aware of mech keyboards via Starcraft 2). Very pleased apart from the stabilized keys being very clanky. I've always tried to lightly press the keys (for typing), so the tactility was definitely noticable. Then a couple months ago they got full size reds (which I had been more interested in than the browns but they hadn't been available), so I got those and have been using them until today. The combination of this thread and the availability of tenkeyless reds (otaku tenkeyless really looks great) has caused me to go back to my browns for comparison.
After using reds, the tactility of browns is very dramatic. It gives a nice sort of rumble when I type, which gives the impression that I'm typing faster and making more progress, similar to the clicks of blues (I don't own blues, but understand the appeal). Without taking a typing test, I'll go ahead and say I think it's more psychological than anything. Also, it's probably because I'm coming from reds but the browns seem to be putting some strain on my fingers now (didn't have any problems coming from rubber dome). I feel like the tactile bump is as jarring as bottoming out (which I rarely do), perhaps even more so because you can bottom out very lightly if you want, while the tactile bump always has a set amount of jarriness that you can't avoid. Actuation force is supposed to be the same for browns and reds, but getting over the bump on browns feels a bit tougher to me. So for typing I'd say reds are more comfortable, but not as accurate since you don't have the tactile bump guaranteeing your actuation (unless you're bottoming out). For typing alone (gaming next paragraph) I'm going back to my reds since a few hours of browns are that tiresome to me now, but if you're comfortable with browns I wouldn't say reds are an upgrade.
For gaming I will absolutely recommend reds because keys that need to be held down (wasd, arrow keys, modifiers, or whatever else) feel wierd with a tactile bump. I can also spam a key a bit faster (although you may not need to in whatever games you play) on reds; you can't ride the actuation point as well (reliably), but the bump isn't there to slow you down.