OK, the switch is refering to the mechanical switches in the keyboards. They are made by companies like Cherry and Alps. They are both mechanical switches, but they are different in many ways, so they all feel different. If you buy a Das II keyboard, that one is manufactured by Cherry, but the iOne M10 buys switches from Cherry and has their manufacturer drop them in. The same is true of all Alps keyboards. My Apple keyboards with Alps sliders from 20 years ago used the Alps switches, but god knows who made them. My SMK 85 which I so adore was manufactured by DS International.
What this all says is that you should search for mechanical switch keyboards and see what comes up. Find something you like and email a rep and ask them what specific switches they use. Then you come back here and look at what people are saying about it, then decide if it is something you want to try.
Mechanical keyboards start at about $50 American and go to unbelievable heights after that. The HHKB Pros we bought cost us anywhere from $200 to $300 plus with shipping, but we all love them and it's not because we all got burned on them - they are great keyboards. They are made by PFU, but that doesn't matter. They do not like these being shipped over here, I got an email back from them that said, and I quote, "This is strictly a product of Japan." Find other vendors like BeNippon or GeekStuff4U.
The iOne M10 can be picked up on eBay for around $50 with shipping, and it uses the Cherry switches with blue sliders.
Also for about $50 on eBay, you can get an SMK85 like the one I love with genuine Alps sliders.
And use this forum; click every link and read every post, there is a great wealth of info here because this site draws people like us exclusively.
That should be enough info to give you a good start in your research.