Main hiddur of calabria is probablly the mesora, so an authentic EY one qualifies (those that only make a bracha on calabria, would probably on those). the rebbe sometimes used EY calabria ones.
however the mesora is far from the only reason. some, such as משמני הארץ as well as טעם הידוע לו, are not transplantable to EY. As such, chassidim are makpid to source specifically from there.