All the stars with lens flares are really close, IE in the Milky Way galaxy.
Also, stars seen as red in Hubble show as blue in Webb. Stars which are red as some in orange in Webb are invisible to Hubble. See around my yellow arrows where I side-by-side shifted these example shots from the website:
Example 1, Webb seeing through clouds:
Example 2, Hubble red seen as blue in Webb, Hubble cant see Webb's orange:
Example 3, Well... Which version of this galaxy looks better? Also, can you see the other galaxies behind the current galaxy?