3 simlar mammillaria//

can you help me?
i almost sure those all three are different species
they all look like magnimamma, but there is more simaler species ?

I think only plant #2 is M. magnimamma, with its very distinctive longer downwards spine.
Plant #1 might be M. wagneriana or pettersonii, it looks like a young plant so might not be so easy to be sure about.
Plant #3 has about 6 spines, all radial as far as I can see (blurred photo), but also long hairs from the axils. those characters suggest a form of M.compressa to me..