I’ve never really listened to Deep Purple, but saw this vid and thought it was quite cool (the whole thing is great, but I cued it up to some clear picking footage).
There are a few interesting things going on here - upward pickslanting with sneaky legato, a different RDT motion for tremolo that he uses briefly, a seeming preference for upstrokes in general, etc…

But from what I have heard of them there is nothing that I would consider neoclassical, etc. (And this could be my lack of deep familiarity with their catalog.)