No, they are not necessarily nicer. They are just more French. They can be nice or cheap just like any 70s-80s bike but they aren't compatible with anything still in production today so they sometimes send you on a quest for parts. The first one you posted was made of nice name-brand tubing, same as the Trek, and had a leather seat, both standout features. That first one in your last post is a capital-P Project
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Genesis 49:16-17