Usually, the premium is on the Reds since they're "rare". The Filco is only 50 dollars more because of their brand name and coming from the UK I believe (if you're in the US). Filco and Rosewill keyboards are manufactured by the same company and use the same stabilizers. It all depends on your preference of switch, aesthetics (some people absolutely hate the Rosewill logo) and price. If this is your first board, I'd look into a Rosewill or Leopold (different stabilizers, read about it in the Wiki) or even a WASD if you want some customization.
I personally have a Rosewill with Reds and love it. I kind of regret not getting Blues, but it's a work keyboard so it's probably better I went with Reds.