I like the one on the left for the simple reason that the character's face is what you see. The one on the right presents a big blob of color (a nice blob but a big one) that, to me, detracts from the character's face.
I didn't even notice the difference in the character's hair and facial shading because of the larger area of color.
All that said, it depends on what you want people to notice.
But my forte is novel writing, not comic work so you would know best.