No it's not the same lmao
men's has the apostrophe, mens doesn't
Men's is a grammatically correct thing to say, for example, "men's fashion" as in fashion of men, and "men" is plural form for "man"
Nominative singular: man
Nominative plural: men
Genetive singular: man's
Genetive plural: men's
In hltv, "men" is spelled like that as a joke, because russian people sometimes pronounce "man" like "men", and "mens" has become the plural for this imaginary word.
So in hltv: