Fair, everyone is entitled to their own opinion. I guess I'm mostly curious on what makes you feel that way.
Lo is bigger, which size could play a role in making a back more durable. He also has top notch speed, which is definitely a notch above Duke. I can see how he has the potential to surpass or match Duke. If you put Duke and Lo in the same high school class, you don't choose between them because they are 2 different backs, you get them both and celebrate that your backfield will be elite for at least 3 years. If they were both incoming freshman I'd expect Lo to make some noise because he's a great north/south runner with sprinter speed...but I'd also expect Duke to make tons of plays out of nothing, because that's what he continually did in high school. Duke's highlight tape from high school is ridiculous, and I would not be able to put any back above him unless they matched what he did in addition to having a physical advantage over him.