Peugeot Grinders are solid. They used to be all metal and wood but (like all brands) they changed their construction a few years back and now even they got plastic parts on most of their models. For most people this won’t matter however. They should last you many, many years. Not cheap though, and very traditional (in design).
Zassenhaus has a very innovative all-ceramic grinding mechanism that can be sleeplessly adjusted from coarse to powder-fine. They are a bit more complex then Peugeot with their Steel-grinders but also more modern in design and theoretically more hygienic. I’ve been reading more complaints about Zassenhaus then Peugeot lately however. Peugeot has been keeping their grinders almost unchanged for many decades. Don't fix what ain't broken. If you really want the best then you are best-off looking for a vintage Peugeot grinder.