one is just a pin (I think the old style) and the other has the newer style loop
I believe (and I'm too lazy to walk outside right now cause of snow) the door pins in the newer YJ and TJ are the Nader pin style loop. and the tailgate latch on the TJ YJ is the same as the old style pre-ralph single pin.
4wd hardware sells both and it doesn't take much to change out.
Jeep: Pioneered by a war, popularized by AMC, revived by Chrysler, jacked by some Germans, and copied by all.