All inter-service rivalry aside......yes, as a Navy guy, I agree with the frontal lobotomy comment, which is less painful than the sex change required to be in the Chairforce.
Also have to agree with the question: WHY? I know it is way cooler to say you're a Navy pilot, but.......
In the Air Guard, you can pretty much stay in your unit until you have your 20 without the pressure to screen for command. In the Navy Reserve, once you pin on 0-5, you gotta be the head banana, or selected as such, or you're out of the unit........you might want to re-think your reasoning for switching.
As a Navy guy, I'd go to the Air Guard.