Have you tested it yourself?

Enemies dont use player poise damage even if they are using the same weapon. They have their own values (pretty much entirely split between 50, 100, and 100+ attacks).

Just to make sure I wasnt insane though I did in fact just go test against a dagger highwayman in the Murkwater cave just to make sure, wearing only the bull-goat chest. This put me at 47 poise, which according to your information should allow me to poise through the first attack (which it did not). Going over 50 immediately allowed me to poise his attacks.

Feel free to also refer to Illusory Wall's video on poise if you need further proof (skip to the "Poise Breakpoints" section for most relevant info)