I've watched a few of these shows on TV and actually attended one (COI) to watch MK. She was not skating all that interestingly. So I've hesitated to go live to other shows.
However, on TV, I noticed that SOI has more ensemble numbers as well as singles and pairs/dance, and COI is basically just exhibitions with a finale ensemble.
Am I correct? If so, I see that as the main difference between the two. (I would prefer the variety in SOI over the straight exhibitions of COI.)
Also neither of these shows is exactly what John Curry had in mind, and maybe John's futuristic idea is just not possible.