The only difference in variation of your style is July's piece I think. You've definitely mastered this style, but maybe improvement may come through challenging yourself by going outside of your comfort zone and trying something different. Different style, different media, etc.. It's always challenging, but exciting too
You didn't improve because... THERE'SNOROOMFORIMPROVEMENTbecauseYOU'RESOAWESOMEALREADY. You're art has never ever disappointed me. EVER. I always feel so delighted to see your art and I've spent long periods of time stalking your gallery. (o-o) You're just too amazing, aren't you?