I have X0 9 and 10 speed gripshifters and there is no comparison between the two, as the 9 speed are the older design and the 10 speed the newer one.
I like both, they work extremely well for me, but the 10 speed are in a different league as the are much quicker and lighter to shift, both up or down. That said, I have mis shifted on the odd occasion, but one gear up or down is no never mind really.
I have found that the bezels can rattle and was accompanied by a little jingle on all the faster off road sections at HONC the other week, but I’ll track that down and fix it sometime, it didn’t affect the function of the shifters at all.
I’ve been using grip shift since they were Sachs Waveys, so I’m a big fan, but unlike others on here, I really like the new design 10 speed shifters.