Having read Elantris, Warbreaker, and the original Mistborn trilogy (there's a new book in the series out that I don't have yet), I can concur with the assessment that Sanderson is probably a better writer than Jordan ever was. His prose isn't the greatest, but his pacing, plotting, and characterisation are top-notch and I have encountered literally no one in the genre who does a better job creating believable and internally consistent magic systems. He also does a good job creating strong, believable female characters, which is a trait that far too few male fantasy authors seem to share.
I will also add that while a lot of Jordan's later entries in the series seemed to sag, Knife of Dreams managed to reclaim the pacing of the earlier entries in the series and stands among the best entries he wrote in the series. Assuming Sanderson's Wheel of Time books are as good as I suspect they are, the last four books of the series are among the best the series has to offer.