i like the wiha 3k drivers i have, for the price there hard to beat, not used them at my workplace so not to sure about the overall durability though, as they get light use at home, seem on par with wera and mac, possibly even snap on (only have a torx set and one plain one)
Snap on instincts are really nice blades are fantastic, and they look good, i currently only have the comfort ones so keep them for 'clean' jobs' as the rubber gets grubby easily, probably buy the hard handle versions next year.
i do like my old mac drivers, but as there is no dealer here now there almost impossible to get, and if you have any other colour than red ones there nla sadly (hence my search for green ones continues...)
I guess its all down to how you like the feel of them and how they sit in your hand lol, if you have big hands the instincts are better id guess as the handle is thicker then the mac ones
wiha have about 50 different styles of handle

tho so you can take your pick..