Different renderings of classical pieces can be night-and-day difference. There are some pieces that have been worn grey from over exposure and then you hear that one special version and it's like it is a completely new piece all over again.
Even today where the printed note is considered sacrosanct - you'll still find that artists are able to inject quite a bit of their own personality into a piece.
Great example is the Well-Tempered Clavier as performed by Glenn Gould versus Sviatoslav Richter.
(I'm strongly in the Rostropovich camp, myself)
Although Argerich is my goddess so who knows
after all a genre that you're not familiar with tends to sound the same.