Hm, never noticed before that horizontal tails on the air force plane are positioned more to the back, compared to the navy version. Weird, especially considering it's the AF variant that should be lighter.
I do see that navy variant's wing start a bit forward than AF's, but still, could that result in enough of the centre of lift point difference to warrant the tail position difference?
Using the diameter of the contracted engine exhaust nozzle as reference, it appears to me the tail booms are the same length on the naval and airforce versions.
i think the overlap between the trailing edge of the wing and leading edge of the tail plane on the naval version, which creates the illusion that the horizontal tail is farther forward, can be attributed to the naval version having larger and wider chord wings for lower wing loading and lower approach speed, and better handling at low speed, and better go around characteristics for carrier deck landing. It also seem possible to me the naval version also has slightly wider chord horizontal tail for more control authority at lower speed. This would also contribute to the overlap.
larger wings and appanage would cause more drag, and adversely affect performance. the Air Force and naval versions would naturally have different perception of the optimal compromise between performance and low speed handling characteristics Because Air Force version doesn’t have to do deck landings.