Well, since I only use Carlton's and Yonex's, I would say Yonex comes off a little worse, though the Nanospeed 8000 grip is not too bad.
low end wilson ones, they have no tack whatsoever and are extremely stiff, no shock absorbtion and not comfortable to play with. my ns8k's grip was quite good.
You should ask Dink, he knows A LOT about grips. I think there's a post for the grips he tried and it's sticky!
it depends on what you look for in a grip, many rackets come with very thin grips which i dont like. low end rackets tend to have less quality grips for cost reasons. I cant remember the last racket i brought where i left the manufactures grip on for its first use.... i tend to regrip with what grip i am using on my other racket/s.
Unless you are talking about lower end rackets, most mid / high end rackets' original grip are not mind to be directly used. Usually, players use replacement grips or add on layer(s) of overgrip based on their own preference.
