I just tested both games.
-TE4 runs perfectly without FreeSync and VSync. I get 120-140 FPS and the game runs smoothly in a 75 hz monitor. It runs well at 75 FPS and 60 FPS, too.
-TE2013 doesn't run bad without FreeSync + VSync (I get 100-120 FPS), BUT is not as smooth as TE4 in this same situation. I feel TE2013 is better played at 57 FPS (max Hz - 3 FPS) with Radeon Chill. At 75 FPS is not bad, but is not actually that smooth.
I mean, it's not a problem for me, but I wanted to help