Luckily, the Spit14s have a prop rotating to the left, which boasts a humongous torque, such as I have never seen in any other plane in AH(except when F4Us come in for a landing and do a ground loop).
Thus, chasing down 109s that turn tightly to the left in a prolonged condition, is not an easy task with the Spit14.
I've tried Spit14s in many occasions, and everytime I was outmaneuvered by a G-10 or a plane like a Yak or a La-7, it was during low speed handling. The Mk14 out turns those planes pretty handily, except the fact that once the airspeed reaches under 250mph, it's frickin' scary to try to go to the edge of the envelope. One step over the edge, and the notorious '360 degrees flip' kicks in.
Thus, only the skilled pilots can really handle the Spit14 to their maximum potential during maneuvering contests. I know I can't do that, but I also know that I've been handed my arse manytimes against some skillful pilots in their Mk14s.
Considering that the really skilled guys are always so few, I think a G-10 has a good chance to survive a fight if it can lure a Spit14 to a low speed contest.
....
On the other hand.. a D-9, or any 190 as a matter of fact, I think has almost no chance against a Spit14.. except the D-9 can always try and outrun it...