FPS in A7 is 36 but visually is very choppy as you move. FPS in A6 is 15 but as smooth as can be.
Unfortunately I have to say, if there wasn't an FPS counter on screen, from a players perspective, A7 would feel laggier than A6, you'd swear its framerate was lower. But I've had the same thing happen in some A6 projects and solved it with code so it's probably a moot point.