Yeah Mulhouse is in the Alsace, just south of Colmar. It definitely has the same sort of vibe to it but is a larger city. An Alsace trip is definitely worth it if you like these sorts of towns.
Colmar - Kayserberg - Riquewihr - and Strasbourg are all amazing spots in the region. Eguisheim, Obernai and Chateau de Haut Koenigsbourg could be added in as well depending on time. You can see a lot of amazing destinations all in one small area and just a few days since all are so close together.
Anyway, that's in case you ever do go there.
I do like them and I wish we could do several days routing and visiting smaller towns there. Nothing is impossible, it's not that far away :)
Until then, your posts serve perfectly :D