Eagle,
Very good read. But all that stuff about the Pacific Theater was beyond the point and question I was getting at. Here's my understanding of the matchup Hellcat vs Spitfire:
Turn Superiority: Spitfire
Sustained Climb Superiority: Spitfire
Acceleration Superiority: Spitfire
Dive Acceleration Superiority: (I hear the Spitfire dives well) Dunno
E Retention Superiority: Spitfire
Top Speed Superiority: ? Spitfire? Hellcat?
Specifically, where is the Hellcat superior?
I have no clue how the Hellcat will gain an E-advantage for boom & zoom tactics against a smartly flown Spitfire. But then, I'm looking at this from my perspective and experience and I'm not a very good pilot.
As far as the Phantom vs MiG17, that's not a very good comparison to the Hellcat and Spitfire matchup because the Phantom had a thrust superiority that the Hellcat does not have vs the Spitfire and in fact, I suspect the Hellcat is worse. But delving into this point more, the MiG17s knew the Phantoms had a dead-zone in close and purposely maneuvered to stay in close with the Phantom. Had the Phantom a gun, the situation would have been different. What really makes the Vietnam War interesting to me, since there is no gun on the Phantom and the AIM-7 was mostly ineffective in a dogfight (especially until the dogfight variant was introduced which mostly reduced minimum range), is that it's really MORE of a tailchase situation than WW2. The Phantom could not take snapshots because there are no guns and it is only when proper rear-quarter parameters were reached before the tail chasing Sidewinder could be launched. The ultimate maneuver and tail-chase fighting I know! Give me an F-8 Crusader though! I digress.

Anyway, the Hellcat is my favorite aircraft of the Pacific Theater and so I really enjoy this discussion and I'm trying to glean any type of tactical benefit I can get. You bring up the F6F vs. Zeke but in that situation the Zeke suffered from a lousy rate of roll at high speed which the Spitfire wouldn't suffer...at least not to that extent. I still find it difficult to swallow that some think the Hellcat is the superior airframe when starting from a fight that's equal at the merge. I think it's pilot skill. However, like I said above, when I fight, I can't tell the difference between a Spit IX and V due to a really old 13" monitor and so I may be mixing up my experiences between the two.
I'd love to see the Hellcat squadron which flies in AH pop in and give me their experience vs Spitfires.
To the point, specifically where is the Hellcat superior?