Mini Desktop What Is The Difference Between A Dell OptiPlex Desktop And A Dell OptiPlex Mini-tower?

What is the difference between a Dell OptiPlex Desktop and a Dell OptiPlex Mini-tower? - mini desktop

I always thought that a mini-tower Dell would be the smaller of the two models, but when I stroll through the memories, I found a website that is on the Dell site and whenever you click on mini-tower, the greater version is displayed, and vice versa. I see this wrong? It's the biggest or the "Mini Tower"? If so, why? As a person (me) to find out what version you have (mini-tower or desktop?) Thanks!