What is the difference between an ipod mc model and an ipod non mc model?

MC model are iPod or iphone of a late model, while MC are a new model. the problem with the new model it's unjailbreakable yet. it has a chip inside that prevent it to be downgraded. So if jailbreak is of no concern of your. go for MC it's faster than the non MC. If you want to jailbreak it and be free of itune store go for non MC