Either at plus odds is prob the bet to make. I think frankie has better standup technique but grey has more power. In a fight this close having the ability to change the course of the fight with one punch is pretty important. I don't remember grey ever being too hurt from anything edgar threw. Edgar by dec or grey by tko might be good line dependant....
With frankies volume and work rate edgar might be able to steal rounds so id be careful with grey by dec as it should be a close fight if it does go to a decision