Since my "best" is topre, but I also have 2 filco's and a leopold, I'll throw in my 2 cents. I got a filco with brown switches first, I used it for about a month and realized it wasn't right for me, I didn't like the tactile keyswitch and they felt a little heavy to me. I did some more research and got a Filco with red switches and a variable weight realforce 86U. I loved both, way more than the brown filco. Only in my opinion, I would think if you like brown switches, you probably wouldn't like topre. I do think there's a similarity between the red & topre though, both have a smooth linear feel.
Side note, I also got a red leopold and compared to the red filco, it doesn't feel as solid. I think its the keycaps, they feel cheaper or something, the whole filco feels more solid and typing feels more solid...closer to the build quality of a realforce. This is all coming from someone that doesn't like loud clicky keyboards.