Are The Shiftall GripVR Controllers Better Or Worse Than The Index Knuckles?

I’m not a fan of buying used knuckles, and it’s expensive. I saw that Shiftall, the creator of the MeganeX headsets, have their own controllers designed to work with the Valve Index lighthouse base stations.

So I’m wondering, if I have to pay $300 or so on used Index Knuckles, why not spend an extra $100 and buy these GripVR controllers which are newer and potentially better? Does anybody have experience with these, and how do they compared to the Knuckles? Thanks.