Yes, it's the same one, only patreon version goes further (not much) which you have to pay for obviously.
Viewing post in Monster Girl Island: Prologue comments
its fine i got the patreon version for free since redamz isnt updating anything hes making people wait extra long so his patreons keep paying every momth because once he finishes the game some patreon wil stop sending him funds so hes milking it rn as much as he wants, and allot of people are pissed about it so they leaking the patreon version of the game