The first looks like a regular M. crinita ssp crinita to me. Is the 2nd one the same as Rep2368/9 otherwise known as M. ojuelensis? I have a plant grown from Koehres seed of this, and I'd say the spines on your plant are a bit darker, but otherwise quite similar. The last maybe is close to M. limonensis?
Nice variants of the crinita complex anyway, and good to show some of the variability that this contains.
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Chris43, moderator