Sorry if this comes off as harsh but you haven't really changed your "style". All you've significantly changed are the eyes, which aren't different enough to call it a change in style. At most you've added some variation.

Style is something that comes later, stop stressing style and focus on the fundamentals of drawing. If you REALLY want to improve stop trying to perfect a style when you have very little grasp of the fundamentals. You're chasing a carrot on a stick.

Definitely an improvement. The left is better.