Which of these images is better?


Which of these images is better?

Attached are 2 files "arrow3" and "arrow4"
Each has 3 sets of arrow shapes in it.

The effect I am going for is:
Left arrow: rising from ground up
Middle arrow: falling from sky
Right arrow: simple shadow, like photoshop

In first image, arrow3,
the shadows are bit noisy,
and in second image, arrow4,
the shadows are much smoother.

My question:
Which of these arrows is better suited for a web logo etc

Thanks