Day trip to Uzez or Aix?

We've been to Aix many times since we lived close by and one of our sons was at the university there. We also stayed in Uzès for five months during the pandemic.
As you said, neither has a major site/sight such as a Roman arena, but both towns do have a lot to see. Aix is a much more typical flat town with pretty builldings from various periods, plazas, markets, and of course the fountains. Uzès is more unique because it's a town that time forgot until the Duchess of Uzès (it's still a Duchy) convinced the then Minister of Culture to restore Uzés. Work began in the 1960s and is still going on.

I've been to a lot of towns in Provence (Uzès is officially in Occitanie but has a lot of Provencal characteristics) but have never seen anthing quite like Uzès. If you go to Uzès, be sure to wear good walking shoes because every street in the old section has been restored with a variety of stones. It took me two weeks to move effortlessly on those stones. If you have walking or balance problems, bring walking sticks, or it may be easier to stroll in Aix.

You'll find a market in Aix everyday (except Monday if I remember), but in Uzès you'll see a good market on Wednesdays but an enormous market that sells everything from live fish and oilve oil to beds on Saturdays. Restaurants are equivalent but be sure to reserve if you go on a market day.

Since bus service isn't as frequent as it should be, you may want to look at BlablaCar rideshare, too. I've used it and would use it again. https://www.blablacar.fr/ This is being promoted by the government, as you can see by the cash offer to drivers after they complete their third drive.

Thank for this input! I may have to see just what the bus situation is as it gets closer to the time we’re going—the bus would have to work both going and returning at reasonable times. Uzes does sound lovely but Aix is too—I appreciate your thoughts on this!