Both Remo and Devi, have been running successfully in cinema's.
Keerthi Suresh and Tammannaah, both played different roles. Keerthi, plays a doctor role in Remo and Tamannaah plays the role as Prabhu Deva's wife who gets possessed in Devi (L).
Both of them have shown their extreme capabilities, and if we would like to award just one of them its pretty difficult.
So here's a pole, to let people decide who acted better:
Picture Courtesy: Twitter/ Kollywoodzone