The
gray one looks really clean! The blue is a very pretty color and you don't see many with that butter interior.
I bought a "package" from CarFax that was like $50 and gave me unlimited reports for a time period. I ran a CarFax on every single truck I looked at. Now CF is not the be-all and end-all, but it has useful info. My #1 criteria was service records...if you can confirm that the oil was changed and scheduled service was done than mileage becomes less important.
#2 criteria was looking for lift kits, big wheels, etc, that might indicate the diesel was also chipped at some point. Now, there's nothing wrong with a lift kit per se, what I'm looking for is adult-owned not adulterated.
Unfortunately Ford tokenizes their window stickers so it's hard to look back and see what options came on the truck when it was new. With Ram you can just type in the VIN and get the sticker on any vehicle, so you can see stuff like HD alternator, snow plow prep package, etc that may not be visible on a walk-around.
Looks like it's worth a trip to go look these over and driven them around.