The only real distinction I make in my collection is between model kits and not model kits. If it's a model, it's a model. If it's not, it's a figure.
The difference is bigger than you think.
Also if I bought statues those would be separate because I have almost zero respect for them. Like, I get that they're highly detailed, but why would you pay hundreds of dollars for something that's just stuck in one pose. At least when I pay a hundred bucks for a model kit I can put it in whatever pose I want