[Piotrsko]

If you increase lift WITHOUT increasing drag, you have generally increased overall efficiency, possibly going to all laminar flow which AFAIK, THE HOLY GRAIL. At that point you get to start attacking/approaching the zero lift angle which should reduce drag further and mutes the lift argument.

I notice that both of these ordinates are significantly undercambered. I am not sure why that is relevant. Could be a traction enhancement.