Two mammillaria

Hello,

The first plant I think is M. compressa, the second no idea at all. Thank you for any comment.

First one could indeed be compressa or centralifera, or something related to those species.
Second one is probably M. tonalensis, a strongly offsetting species, where the offsets are very easily detached.

Wolter.

Thank you very much, I think you identification is correct, the plant presents the features you mentioned.