it's debatable between the two. Hardy is definitely a tough, balanced player who we really missed late last season when he was limited with his injury.
Before the announcement of Pope signing Johnson, though, I had never even heard of him (I remember his brother a bit — but didn't even learn they were brothers till this last spring, I think).
So I'm not sure where my biases would come from. --Outside of my own eyes & what evalutations they've made over the last couple years of watching the three guys in question (admittedly, as a BYU fan I've seen more of Hardy & Knell than Johnson; there certainly may be weaknesses or limitations to Johnson's game I haven't figured out or noticed yet).