Fun fact, parties, and more importantly the people in them change and evolve over time. They aren't stagnant. For example, we see this with the Republican party which use to hold claim to things like law and order. But times change, and so do parties.
So just because something was a certain way 20 years ago doesn't mean it's still that way today. That would be CRAZY to suggest that.
They have "evolved" to the point there is no difference between them anymore