i tried that nismo titanium knob, the jdm type2 knob, and now running biggie type-r knob.
i would rank the knobs like this:
biggie type-r
type-r
stock
titanium nismo
jdm type2
the type2 knob has a weird egg shape at the top that tends to slip out of my hand. the titanium knob is square at the top while thin in shape, i didnt have mis-shifts. biggie and standard type-r knob has the best of both worlds, shape and weight. stock knob is also good. i use it on my G.