I used to think Rogers was better than Morton. I don't hold that opinion any longer.
Rogers was extremely talented and a heck of a wrestler. He took big bumps, had some nice flying moves, decent ability to work the mat, and good charisma. But Morton has all of that too and does it better.
As an FIP, both guys did a great job. Both took big bumps to get their opponents offense over. But their bumping styles were different. Rogers bumping was much more classical - big bumps on his back and some neck bumps when moves required them. Morton would often take a bump on to his knees and go to the mat, where he would take two to three more mini bumps when his opponent punched him in the face, neck, chest, back. Rogers bumps stick out far more than Morton's but so do Ric Flair's when compared to Ricky Steamboat. Flair took big theatrical bumps, Steamboat sold little things a lot more so he didn't have to take as many wild bumps.
Move wise, they are equals. Morton had the rana, Rogers had the old style flying headscissors. Both could do a variety of arm drags, often bringing some lucha flavor to them. Seen both adequately work the mat.
In Cornette's results book, he talks about a 1988 MX/Fantastics match from Miami that he wishes was taped, as it was the best match they had together from his view. With the new Cornette raw footage of the 1986 feud, I think the RnR will start to be more highly though of (Mid South and Memphis DVDVR projects have helped this).
Also, I think Robert Gibson is a better wrestler than Bobby Fulton. Fulton takes him on charisma but Gibson never had a performance like Fulton did in one of the tag matches on the Mid South set, where Fulton fired back a punch every 10 seconds while being the FIP. He got zero heat and the tag didn't get a pop.
In re-watching 1988-1990 MX, Stan Lane certainly doesn't hold up nearly as well as Dennis Condrey. It's mostly the kicks. When he lands them well and has someone selling them well, he is good. But often, one of those two things is missing.