I bought the red one after I lost my 'evener' I cant remember what its called. So I just never bought the dark one.
I really like the red one, the evener was a little too sublte. But I have left it in the hot car one too many times, so its not going on smooth anymore, but I still like it.
I'm a blender anyway, I cant just have one color on my lips, I always add other things like a pencil or a gloss over it.