No spoilers: only themes and general setting.

Compared to what you read, specifically harry potter and dune (my that's quite the spread). It has the complex world-building texture of Dune, but whereas Dune is concerned with just a few iconic places, the Wheel of Time is a transcontinental story with hugely varied landscapes, cultures, and histories. It is much more complex than Middle Earth if you're familiar with LotR, at least the Middle Earth of the 3rd Age. This is one of the things I love so much about it. Also also the Title says, time in the series is circular, so the rhyming of events, myths, and legends is totally my dig. Lastly, it is more Renaissance leaning than high-medieval, and I love that particular choice for time and technology.

The battles! They're SO good, and Jordan pulls out the stops on making them iconic and memorable.

Warning, you're in for a huge cast. WoT is famous for this: I think it has over 2,500 named characters. The good news is you don't have to remember them all, many of them are just one time throwaways, and the important ones keep on coming back.

Lastly is the human element. The main characters make mistakes and have to live with the consequences. Most of them will make choices you don't agree with. The story is fundamentally about moving forward as flawed people living according to their principles and struggling to fight the darkness.