If Murray had more power this would be a pretty tough fight to call. Both dudes are tough, have really good work rate and zero defense so it will be a barn burner for about 5 or 6 rounds before Rios' power advantage proves the difference. I don't think Rios is as good as he's being made out to be.
Rios will have done the business by the end of round 7
It is gonna be one hell of a barn burner whilst it lasts and i doubt there will be a boring & feeling out round