Hi Lee,
I think I’ll write a blog piece about this – to clear it up. It’s actually an innovation that we are very proud of – and it was not to reduce cost (in reality, it added quite some development and manufacturing complexity to the product).
Because of the lightness and sensitivity of the Cherry Reds (which is fantastic for gaming, and much better than people think for typing) we wanted a different switch pressure for some of the other keys – especially the macro keys – so you don’t actuate them if your hand brushes over them. So we decided to use the Cherry MX key switches on all the keys except the top row (Escape through F12 plus PrntScn/Scrl Lock/Pause) and for the “six pack” (ins/Home/Page up/dn, Del, End) where we have tuned a silicon dome keyswitch strip with a slightly firmer spring rate and more damping – thought the electrical response (1ms) is the same. These keys are not used for double taps or movement keys, so we preferred a firmer, less twitchy feel on these non-typing keys. These are keys you want to hit once, and need to nail solidly every time.
On the K90, we also used a separate silicon dome keyswitch matrix for the macro “G” keys because it allows us to put these keys on a lower plane than the main typing keys – again, so you can find them by feel, and so you don’t hit them accidentally (Competing brands and their users have complained about hitting “certain Keyboards” when they really wanted “Escape” – which can have dire consequences!). These keys have a fully programmable repeat rate/multiple in the macro software, so you won’t be using these for double-taps or triple-taps anyway.
This is the type of design innovation you get when gaming enthusiasts engineer a keyboard from scratch - without the restriction of using a mass-produced office keyboard as a starting point.
Our Keyboard have been designed by true Gamers, They will play a game for 15 hours solid over a weekend.