I discovered when I changed from a 1968 Sport Satellite hood (same as a Satellite) that the plates inside the hood frame that the hood hinges bolt to are welded into place after the hood is aligned on the car (or welded using a jig beforehand). Apparently I went from a set up where the plate was at one extreme in the original hood and the replacement 68 RR hood was welded at the other extreme. The adjustment between the inner fender and the hinge couldn’t make up for the extreme difference, so I had to drill out the spot welds and slide the plate inside the hood frame. The hood frame did have slotted holes, so there was adjustment available at that side after I drilled the spot welds out. Now before I remove the hood again, I will drill and thread new holes for retaining screws to replace the missing spot welds. Otherwise, the plates will slide away and will be a nightmare to get back into the right spot again. Just FYI.
Also, I concur that another big difference is that 1969 hoods are cut out under the inserts which point up, while the 1968s aren’t.