Would a merely improved Hellcat still beat the Zero?

If the F6F Hellcat were only a modest improvement over the F4F Wildcat, would it be in trouble against the A6M Zero?

Not necessarily: sound tactics already let Wildcats contest Zeros, and even a modest improvement would be backed by much deeper American pilot-training and replacement capacity.

The Wildcat was already effective when flown with appropriate tactics, so an improved successor need not dominate every metric to remain useful. The larger advantage is institutional: the United States could absorb aircraft and pilot losses while preserving a much greater share of its combat experience. Japan's narrower training pipeline made each veteran loss proportionally more damaging. A later clarification notes that the real F6F received the 2,000-horsepower R-2800 before entering service after early combat showed the need for more power.