It is the best as far as I know but yeah it has some problems like some (most?) other Italian stuff from BU (and other companies like Arrow). I think the grain in it is not really film grain but instead it is some sort of scanner noise or something.
I’m not sure if it was ever confirmed but BU, Arrow and others were all suspected of having used the same company for the scans of their Italian films (there probably wasn’t even a choice, the company was decided by the rights holders) and that company has/had a not so good scanner. Can’t remember the specifics but I think Synapse’s Don May Jr. even once mentioned (on a forum, not to me) he had been warned to never use that scanner. xD