Calvinism as in Pre-destination, no mortal choice in salvation and where women are 2nd class citizens?
I’m talking about “unconditional election,” where, according to strict Calvinism, the elect are born Christians, and they will always be Christians. The difference with OSAS is that people choose to be Christians when they are saved, but after that point it is like Calvinism, they will always be Christians. After the point of conversion, it’s like OSAS Christians become unconditionally elected. They’ve used up all their choice in the matter.
Not being either one, I will leave that debate up to those who care.