I agree about typing on reds. The browns feel lighter, probably because the reds don't get that little reprieve after you get past the tactile bump. According to the force diagrams, both browns and reds take the same amount of force at the bottom. However, that doesn't take into account the inertia of your finger/key. I think that is why the browns feel lighter.
I can get used to typing on the reds. Coming from a Model M, it is easy to just bash the keys down and get the feedback that way. But they are not the best. For gaming however, I like them a lot.
As far as durablility, I have a CM Storm with reds and a Rosewill with browns. Both feel similar in terms of quality. Maybe the creakiness of the Filco is just a matter of age?