Based on some admittedly
casual research, I don't think you can compare Spolin's games to what we mean when we refer to role-playing games (i.e. TTRPGs) today. There's no continuity of characters over multiple sessions, no increases in personal ability or acquisition of resources that make a character more powerful or competent, and no use of a referee or judge.
It might be a form of proto-LARPing, and
maybe can be compared to Braunstein, but it's hard to call this "recognizably role-playing games" in the vein of D&D.