If you want to out-climb spits, fly a 109.
Spiral-climbing is a fun move to pull on cocky spit pilots who think they can follow you up.
Climb up and right in an upwards spiral, looking back and right to keep the spitty in your field of vision.
Try and keep it in the bottom right corner of your canopy as you climb.
Climb climb climb, (drop flaps if necessary) watch spitty stall out, roll over dive down and take the nice broadside shot on the flailing spit