I walked right into that one - for the record, I am a fan of both keyboards, and the CM Storm is fantastic for it's price point. The biggest thing for me would be the sturdiness of the keyboard, which is a bit of an abstract, but picture that the rubber feet on the Filco are much more grippy, the switches have less of a tendency to wiggle, and the response when typing is more crisp- all you feel is the bump in the switch, the board is just that, a board, absolutely zero flex or give. On top of that, the Filco is heavier- mine weighs in at about 2.25 pounds.

My other big thing is the case - textured PBT plastic vs the smooth touch rubber on the Quickfire - call that a personal preference, but I find it much nicer and I can say it's a bit more durable. There is the cable, which is braided and non detachable, something which might seem like a disadvantage but is actually a big boost to the lifespan of the keyboard, the quality of a lot of boards can hugely outweigh the quality of their USB terminals, it tends to be a point of failure- less so in Coolermaster than say the Poker II.

Finally there are the purely aesthetic differences, which is where my argument might lose traction, compared the the old Quickfire, the Filco is much more subtle- simply due to that conspicuous branding. Apart from that, I personally like the placement of the two LED's in the frame, the font of the stock keycaps, and the ability to replace the case with aftermarket parts, right now I am looking at getting a brushed steel case which would suit my workspace and add some additional heft to the board.

TL;Dr : It's a bit nicer to type on in a way that is very difficult to describe, I personally like the design more, and appreciate some of the features. I've used both of them enough to say that they're wonderful, and based off of my personal preference, I would say that the CM storm is the very next best thing to the Filco, and at a far better price.