One is 140 hours, the other 12 hours. So, mainly this calibrates JWST as 10-20x Hubble sensitivity, with noticeably but not radically improved sharpness, but radically less noise. Presumably the actually important results will be the much longer exposures and the redder things Hubble can't see at all, or that would be obscured by noise.

JWST depends very heavily on gravitational lensing and perverse perspective (where things far enough away look bigger because the space they were in grew) to get usefully detailed images. Which is a Good Thing, because we could not have lofted a big enough mirror to get such images directly.

In The Future, when we loft hundreds of flat mirrors maintained in an array hundreds of km across, all this will seem pretty pedestrian. But those will have to be out by Neptune so the whole thing can be kept cold enough to be useful. Powering it will be a tricky affair: it will probably need beamed microwave power from a correspondingly large solar concentrator, or maybe D-3He FRC reactor if that can be got working. Then, getting the data home will be a project of its own.

In the more distant future, civilization will have shifted major operations and population out there to take advantage of access to the thermodynamically most irreducible resource, cold. That probably cannot happen until after p-11B fusion is mastered. (To be clear: people won't move out there, much; rather, population out there will outgrow Earth's.)