Hartline has more size, speed, physicality and starting ability than Bess who is strictly a slot receiver. That said, both of those guys have made a lot of big plays and first downs. Those new guys have a lot to prove. Hartline can play an outside WR spot as long as he has someone on the opposite side drawing coverage. Hartline has a way of getting separation with a sneaky push off..but he gets caught sometimes.
I hope the new guys can put them on the bench, but I will believe it when I see it.