These are annoying to me because lacks of real difference from a senior astronaut viewpoint. As a normal user, the only difference i could see is just "brighter", anything more to add to the details ?
JWST shows a much bigger part of the wavelength spectrum. That means it can image things that would just not show up in Hubble.
E.g. think about far away galaxies that have been redshifted so much (due to the expanding universe) that they fell below the lower wavelength threshold of Hubble.
Zoom in on a small section of sky and toggle between James and Hubble. James reveals many additional galaxy in each tiny slice of image. Probably hundreds or more in that one image alone.
Else i could say, just the same.