Welcome to Tnet.
Showing us any marks on the bottoms would be really helpful as said above and confirmation of whether 'mini' means the set is child-sized/doll-sized.
In the absence of any more information, it looks to me like blue lustreware of the kind commonly produced in Japan by Noritake and others for export to the West (both full-size and child-size). Neither the profile of the items nor the handle shapes would suggest them to be 200 years old and they are more likely vintage, perhaps bordering on antique.
I'm not seeing a mismatched cup. Is it not just that the scrollwork decoration is on one side only and one of the cups doesn't show it because its facing the other way?.