Can you quantify how much better JWST is compared to Hubble? For instance, from what distance can each "see" (differentiate) a sun-like star?
Maybe there are other measures.
Due to the redshift very far stars and galaxies are not detectable within the range of visible light but as infrared. The JWST is built for longer wavelengths than the Hubble so it can "look" farther.
Hubble could not "look" farther than about 400 million years after the big-bang, but the JWST may look to about only 180 million years after the big-bang.
You asked for distances and not for the "age" of light. I am sorry, it is not possible to calculate a well defined distance from the age of light.