oh and if any bike has a shitty or uncomfortable seat you can get a 'pull off' seat from your local bike shop for $10-20. They are usually nice seats.
You can also guy a new seat on amazon for $20. The ones at the LBS are name brand if that matters to you. (the shogun has a torn seat, don't not buy the bike because of that).
I'd say to ride the shogun/peugot and the trek or giant and see what the differences are to you. If you consider the extra comfort important you'll buy the newer bike.
However from a fashion perspective an 80s road bike is considered cool. Those other bikes are cool too just considered cool among bikers.
A 70s Peugot will be 32lbs or so in your size. An 80s Shogun probably 29lbs.
00s Trek and 00s Giant will be 19-24lbs. It makes a gigantic difference. The 00s bikes will also have more speeds and wider gearing to crush hills.