WhenI checked insurance a few years back, as a student, I was paying about $100 more than after I had completed training. And all of my training was in a 152 at that time.
Of course, the other big variable is "Hull Value".
By the way, a four seater was about $400 over the price of the 150/152.

Tail draggers were double, and a Mooney was more than that. Something about short gear and low time pilots.
