Hoya has a slight effect on image quality if you bother to look closely. Also B+W is easier to clean and wouldnt leave marks on the coating. Not sure about the higher end Hoyas but then Nikon and B+W would be a better choice over the long run.
I changed my Nikon NC to B&W. Both are expensive. B&W is so easy to clean. Usually i only need my blower (ocassionally use lens tissue for more stuborn stain) and dust dont get into the lens cos they uses screw in ring to hold the glass. Hoya uses clips only so there is a tiny gap where dust sometimes can get in. and one more thing abt B&W is the housing is made of Brass so its easier to unscrew from the lens. Hoya and Nikon tends to lock up.
I have no regrets using B&W cos it save me all the trouble.
my hoya mrc filter's coating peeling off after 8-9 months >___<
dunno bout the b+w, they said its more long lasting...
for the photo result wise... i cannot differentiate between those two... i cant even see the difference at the photo result if you compare with the cheap tokina/matin filter