Kamara has the best balance I've ever seen from a RB. His first step explosion through the hole is phenomenal. He's also an incredible pass catcher. He could probably play slot receiver in the NFL if he wanted. His skill set is made for the modern NFL. I think he has multiple 1000 yard rushing and 1000 yard receiving seasons.
Alvin Kamara = Marshall Faulk
The most obvious issue with the Faulk comparison is while Alvin is no glue horse he's decidedly slower than Marshall who had legit sprinter speed.