I'm right or not? (cristatas)

Hello, if is difficult for me to identify Mammillarias, more difficult is identify M.f Cristatas.  
If someone can help me, i appreciate.

IS this a :

1:Mammillaria cylindrica f. cristata hort




2:Mammillaria cylindrica f. cristata hort



3:Mammillaria cylindrica f. cristata hort



Thanks all.