please help with ID ...

hi,
I'm defintely NOT Mammilaria's expert, thus looking for help.
Could you recognize IDs of following Mammillarias ?

could be E.enopla or E.ferox;
from one side thicker thorns like enopla, but shorter and less reddish.
for me also more probable E.ferox

Respect for your knowledge and thank you; lot of useful information.
Pleasure to read, even if not all clear for me still.
I do deeper dive into the topic, as having always problem to classify plants from these genera.

btw: any idea about ID of the cacti from the pic ?

the dark one on 1st photo and flower on 2nd is the Setiechinopsis mirabilis.
Like the one very much; blooming frequently, the flower has nice mild scent.

hi, 1. ID Can anyone recognize the ID ? Is it Eriosyce ? Pyrrhocactus ? Any other ? 2. Taxonomy What's in fact the diff.between Eriosyce, Pyrrhocactus, Neochilenia and Neoporteria ? One group contains another ones ? Any diff. between these species ? I have problems with the taxonomy, what ID to use....

hi,
I suppose it's G.leeanum.
Not sure however, thus need confirmation from experts.

great !
really thank you 7george !

hi,
Can any Mammilaria expert recognize an ID ?
Blooming first time...

hi
just bought my 2nd Melocactus (1st was the M.matanzanus).
Nice, healthy, with cephalium.
Diameter ca. 15cm (6,3 inches).

Any idea what ID it is ?
M.amoenus ?

hi, Among many Opuntias and Cylindropuntias I've planted the one. I can't find the ID of it, however suppose it's (Austro)Cylidropuntia, isn't it ? C.spinosior ? Or I'm wrong ? Can you name the ID ? Is it winter hardy ? In my zone -5C Dec-Jan and -10C-15C in Feb is rather usual (except last 3 years ...

wouldn't P.strausianus fit better ?

indeed N.succineus seems to fit.
thank you all for the ID as well as for explaining diff. between Parodia and Notocactus.

What's the diff.between Parodia and Notocactus ?
Thought it's the same...