Mammillaria melanocentra and M. heyderii subsp. gummifera?

Hello everyone, does anyone can confirm the ID of these plants?

My guesses are M. melanocentra and M. heyderii subsp gummifera.

Thanks in advance.

Some more pictures

Maybe ….
Mammillaria formosa and Mammillaria sonorensis….?

Thank you, Maurillio. I had already came to M. sonorensis too, but M. formosa is something I had not considered yet. Thank you!

Take a look at M. formosa ssp. pseudocrucigera as this is probably closer than the typical species. Maurillo's suggestion of M. sonorensis seems a good fit.

Thank you Chris.
Do you guys think M. heyderii ssp gummifera is not a possibility?
thanks again

This is a Mammillaria heyderi ssp. gummifera in flower…
Mhhhhhhhhh…………..

Oh ok, It is quite different!
Thank you very much!