I don't think he's better than a healthy Fournette; Fournette is physically a freak. Guice is fricken special though.
Yeah Fournette is a once in forever talent. Guice is more consistent due to LF7s injuries. I may be completely off base but I think guice is a better football player. Maybe that doesn't make sense but it does to me. Fournette seems like he gets distracted at times.
I think Guice has better feet and balance. Lowering the shoulder into an opponent is nice to get the crowd, and sometimes your team, hyped, but in the long run it will be better for Fournette to try to avoid contact. Especially in the open field. Besides, lowering the shoulder breaks your momentum. There's a time and place for it. I just see Fournette using it when it would be better not to. Go watch the opening play of the Auburn game in 2015, for example...
Fornette's kryptonite is his feet. You can't body tackle him but you can grab a shoestring and he is going down. Guice has a better 2nd and 3rd effort because his feet never stop. Even when he is on the ground with 3 fuggers on him, his feet are moving.
Its comparing apples to oranges. They are 2 completely different runners. Guice may be the better overall back because of his jumpcuts and vision, and ability to the line create. He will have a really good career in the NFL. Fournette is different. He has higher top end speed, he can run people over. He can stop on a dime change directions and hit top end faster.
Kinda reminds me of PP7 V TM7... PP7 being the better corner but TM7 being the better football player, imo...