I agree with Hugo.
On the first view, a similarity exists, but it is really not M. acultzingensis but indeed M. rhodantha.
M. acultzingensis has maximun 2-4 central spines and no bristles in the Axils.
On your first picture I believe to be able to count up to 6 central spines, and I believe to be able to recognize bristles in the Axils. Moreover, M. acultzingensis flowers not in truly closed wreaths and always opens only few at the same time.