Number 1 looks like a young mamm. camptotricha to me.

#2 is Mamm. / Dolichothele baumii.

Jordi

For the #2, looking for close to the ground Mammillarias, I found these: M. kraehenbuehlii, M. laui and M. surculosa.
And for # 1 I think it is M. glassii
Alfonso

Ok, Alfonso, you may be right with # 2 = Mamm. glassii.
Does # 1 has hooked central spines?

Jordi

I am going to check it, and I made a mistake with the numbers
Alfonso

Yes it has long hooked central spines.
I am not in my computer right now, so I wil post again
Alfonso

G'day Alfonso, I think #1 is M. surculosa, and #2 is M. glassii.
I looked at this post last night, which sent me off to find some pics, I found this one of surculosa when it first flowered but no glassii.

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Cheers, CP

Well, I stay with M. surculosa for #1 and for #2 I have a new picture with tiny white flowers. Does it happens with M. glassi?, I found only images with pink flowers, but the body is like M. glassi ssp glassi
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Alfonso

M. glassii can have very very pale pink flowers, but I don't think they are ever pure white. Hint of pink, anyone?