The CM Storm Quickfire is made by the same OEM as the Filcos, so it's of comparable build quality. Given that the Filco costs a lot more money and has one of the best reputations in the industry for quality, this is a great selling point for the CM Storm.
The QuickFire Rapid is recommended as a great beginners keyboard on pretty much every enthusiast community out there due to it's value for money. It's made in the same factory as the Filco's so the build quality is great, easy to find online & comes with a good selection of switch...
The Vengeance K70 uses Cherry MX mechanical switches throughout the keyboard. They are also easily replaceable for those that would like to try out different switches or use a certain combination of them for gaming.
There is a way to easily turn off the Windows key on the keyboard through holding the SteelSeries function key and then tapping the Widows key. This way there will be no accidental presses while gaming, which can interrupt ones game.
There are 22 programmable keys available on the keyboard as well as numerous macros that can be used with the regular keys. This makes for a wide selection of ways to customize the keyboard to how you play a game.
The silicone switches used require the user to bottom out the key in order for the key press to register. Unlike mechanical switches found in most professional gaming keyboards which do not require this and tend to last longer.
Logitech's wireless peripherals use a unified receiver where many devices can be used on one receiver. This makes for an easy way to use a Logitech wireless mouse, keyboard, etc without having to have numerous USB receiver plugged into the device
There is an on off switch on the keyboard that allows the user to turn off the backlight illumination of the keyboard. This is a lot easier than using software on the PC as it is more accessible, especially if the screen is off.