Both use a variation of the vewlix layout, i think the kai has a bit more space between the stick and the buttons iirc, i cant imagine it beeing problematic.
As for the te2+ issues. Madcatz sort of cashed in on their successes with their last gen sticks by jacking up the prices and offering a stick that looks a bit more premium. They had pcb issues last gen aswell, but their support was a bit better imo. The issues were more easily excusable as og te’s could be found cheap during promotions anyway, adding an aftermarket. pcb would still add up to a relatively cheap good quality stick.
I would argue that a vlx is more premium anyway.