The JWST and Hubble have multiple cameras. The Hubble IR image is likely just the IR camera while the JWST is likely a composite of multiple cameras.

(This is purely speculation.)

Put another way: jwst sees both the clouds and (many of) the stars, while Hubble seems to have been able to see one or the other more clearly at a time.

You could infer from that that the thing jwst is doing better is having a much greater range of spectrum available to it at a time (though I don't actually know if that's correct).