The original Suspiria stands out more for its visually stunning aesthetics than the story, which is rather straightforward and nothing particularly new. The remake, however, makes many changes to the story that make for a much more interesting watch.
Dario Argento's Suspiria (1977) is a classic. There's simply no other way to describe it. Its use of garishly bright color, the amazing soundtrack by Argento's band Goblin, and Daria Nicoldi (Argento's wife at the time)'s fairy-tale-inspired story are groundbreaking.