As I said, I don't think the choice is based on actual skating.A retired skater..? JPN has Satoko, Europe has Morisi.
Having said that, I wouldn't equate Satoko and Mariah. Satoko has been doing a lot of skating even if it isn't at competitions. I listened to the podcast Adam Rippon did with Mariah. She herself says that she doesn't do much skating - maybe once a week. And she talked about how quickly she lost some of her jumps and is even afraid of trying certain jumps.