Zamberlan leather is much thicker than Lowa, across all models I’ve ever owned (quite a few). Lowa resole service is also done in house in Germany and they come back looking great. Takes like 4 months. Zamberlan refers you to third party cobblers. I wasn’t impressed with what I got back, though it was obviously faster. Something else, if you care, is that Zamberlan is all made in house - meaning the uppers are stitched there as well. Lowa sends uppers sewn in Czech Republic to Germany and Italy for “made in” labels, which is allowable under EU rules. Gucci does this also, all uppers are made in Romania and the soles are attached in Italy and presto, made in Italy footwear.
When I sent mine in they came back with the same goretex leak they left with. It was also about $125. Year or two ago. Didn’t see that option.