Salty's post compares the AF to the Navy, as he mentioned, the ANG is not like the regular AF anyway.

In your case there is also the question of what do you want to be when you grow up?

Career military officer (emphasis on officer, not pilot): Better go active duty. Expect frequent non-flying tours, and eventual duties related to command and control of things other than airplanes.

Commercial Pilot or other civilian aspirations: Go ANG, you can fly for the guard and spend most of the month doing other things.

You can also do active duty for your initial obligation (ten years or so) and then transfer to the ANG, Navy Reserve, or USAF Reserve. You should be able to get a reserve job doing something to at least finish your 20 years for retirement but you may not be able to get a flying job, especially in the Navy (the USAF reserve will also probably shift heavily to UAVs).