Well, I had the opportunity to try this out last night.
There was a Typh over my field last night while I was in the tower. I watched him pick this guy over and over, always keeping his alt and diving on this guy re-upping and basically blowing him up in a pass or two. Finally, when his back was turned, I upped a D9 in the opposite direction and climbed out on WEP. Once I got about 4k of alt, I reversed and accelerated to about 300 mph.
Now I'm approaching him 1v1. He sees me, he's about 1.5k above me and of course he dives on me. I pull into him and he misses the HO/high angle shot. We extend a bit, go another turn and he settles 800 to 1000 back from me. I do a couple of scissors, barrels, etc. and eventually end up 600-800 out from him flat out on the deck.
At this point another guy engaged me and I had to break off. I feel confident that, had I not been engaged, it would have been a foot race. Given this guy had been B n Z'ing for several minutes before I upped, it's debatable if his WEP would've run out in time for me to run him down. Had that happened, I feel confident I would have killed him.
I can't be certain, I'm not expert in either plane, but it certainly seems that beyond the 2nd merge and a few twists, the Typhoon had realized that further maneuvering would only have served to reduce his energy to fight, while the Dora retained enough low-E maneuverability to shift the advantage to the Dora. Realizing that, the Typhoon disengaged and used low-alt speed to egress. However, given equal speeds at the start, the race would ultimately depend on who had enough WEP left. It would have been fun to continue this fight. This guy didn't seem to be a total n00b in the Typhoon, can't say for certain, and it would have been interesting to follow this experiment to its logical conclusion.
Might be fun to DA someone and try this again.