
I can't say which would fit better, since there is barely anything else to compare it with?
I think the black contrasts too much. It is really noticable on lighter backgrounds. The simpler edit I made blends in with lighter backgrounds though (especially the green), so you probably want to keep a darker colour.
You should bring the back leg into the small sprite. Currently the sprite looks like it's side-on expect the plug, which makes the plug look slanted compared to the head.