Man, these planes are so close to equal. IMHO: edge to D9 in high speed fights. The roll rate is something the pony simply cannot match and it is not too difficult for the d9 pilot to use it for reversal...
Low speed I give edge to pony.... turn radius, combat flaps... etc.
Individual traits are nicely divided: speed to D9, roll to d9, climb to d9, wep duration to d9.
Gun ballistics to pony, cockpit views to pony, turn ability to pony, fuel duration to pony.
Some may wonder how much cockpit view can matter. Strictly IMO, it can matter quite a bit... most especially when tracking multiple victims.