Article says they are Kailh Box White switches. I’ve used Kailh Reds, Blues and Browns and they all feel exactly the same as CherryMX switches (of which I’ve used the same colors).
I have never used a “Box White” or even heard of white switches from any brand. All I can attest to is the other Kailh brand switches I’ve used are just as good as the more popular brands, but cost less.