The first one is a nice specimen of M. haageana ssp. conspicua to my way of thinking.
And I'm afraid that I think the second one is also that species!
There are obvious differences in spination, mostly with the central spines, your first plant having two dark long ones, and the second plant four light brown shorter ones. But this is, I believe, well within the natural variation for this species.
Reppenhagen says it has 14-25 radial spines, and 2-4 central spines, 5-13mm long, glassy white, or glassy yeloow, or brown with darker tips or completely black.
When I was in Puebla in 2005, I saw such a wide variation on plants of this kind, that it really was confusing. I had taken Pilbeam with me, and his description of ssp. conspicua only suggested 2 central spines. Now I know that is a little restricting!