F4F:max speed- 515km/h, range:1240 km, rate of climb 9,9 m/s, 6 X 12.7 mm machine guns.
A6M:max speed- 533 km/h, range:3150 km, rate of climb 15,7 m/s, 2 X 7,7 mm machine guns, 2 X 20mm cannons.
Obviously, from technical point of view, A6M is supperior.