I think Jordan’s writing improves a lot as the books go on (as one might expect really).
The difference in styles in a lot more noticeable in the first book Sanderson wrote. There are things I prefer about both - Jordan did description a lot better but tended to overstuff with it. Jordan’s dialogue felt a lot more suited to the world (Sanderson tends towards more casual dialogue). Sanderson definitely got things done a lot faster - I suspect if he’d written the whole thing it would have been closer to 8 books long.
It’s an odd one - I love the series in a big way, but I think I first read it at the right age for reading epic fantasy novels. I don’t think that if I was approaching it for the first time now I’d have the patience for it.