I found the coordinates of the S8035 at the UIUC website and its designation as aerobatic but, there are no low speed windtunnel tests to reveal its stall characteristics. Nor was I able to find any low speed windtunnel tests to reveal the NACA0014 stall characteristics for models.

An airfoil for aerobatic application should have low drag at high lift coefficients and high drag at low lift coefficients to limit acceleration so as to present a more uniform appearance of relative speed during maneuvers. It also should have an abrupt stall to facilitate snap rolls and spin entry. Hysterisis in stall characteristics requires higher airspeed for spin and stall recovery. Stall characteristics should have a high priority in aerobatic airfoil selection.