FWIW- I have a '73 PX-10, a '72 Gitaine Super Corse (a Tour de France with Campy bits instead of French), and a '73 Tour De France. None of them are museum pieces, but all of them are original and I have ridden them all hard (the Tour de France is currently my commuter bike, sew-up tires and all). I think the finish is better on the PX-10, but this is not saying much. The frame construction is average, at best, but do not have many lugged, period bikes to compare it to (Masi, Bottecchia, Moulton, Romic, and a Raleigh 5-speed). The Gitane silver foil stickers are simply dreadful (I actually took them off the Super Corse they annoyed me so much).
I must say that the Gitanes probably ride as good or better than any other bike I have owned (and I have owned a lot). I still prefer them over many others in my garage. I also think that the Gitane is a better deal than the Peugeot primarily due to the use of Tippo hubs and they did not use the Simplex derailuers. In fact, the Huret's on my TdF have thousands of miles on them and they still work great (or at least as good as they ever did). In contrast, all Peugeot had to offer was a leather saddle...not where I would have put my money. I think PX-10's carry more of a premium, and that is just fine with me.
Just my thoughts,