2 Mammillarias......Scrippsiana or Bocensis ?

Hello everybody
today I need your help for another italian cactus lover.
Few day's ago he posted some photo of mammillaria in a forum, asking for an ID

I think the Mammillaria is bocensis or scrippsiana, what do you think?


He told me that he bought a Mammillaria bocensis and post this photo of the plant,

but is this really a bocensis??? I don't think .
I belive it is scrippsiana....................but I'm not a great expert so, we decided to ask to you
you can see the italian page where we talk about it here http://forum.cactofili.org/viewtopic.php?t=6595

Hi Lucio,
My feeling is that the first plant is bocensis rather than scrippsiana. The second one certainly isn't, imho, bocensis or scrippsiana, but a form of wagneriana, although it has more radials than is normal. But the top central spine is like a form called obscura, whch various "authorities" have either made synonomous with wagneriana or pettersonii, though I favour wagneriana if you have to lump it.
No doubt others will correct me if I have it wrong!

Thank you Chris
I would never have thought about this
I have a lot to still learn