When I was learning to fly, my Dad, a career fighter and instructor pilot in the U.S. Air Force, warned me to never navigate by following railroad tracks between towns....... I might run head on into a "Naval aviator".
He also said that you could always tell the pilots from the mechanics in the latrine........... the mechanics wash their hands before they piss.
When he was 19 he would fly his P-51 from Martlesham Heath Airfield in England to Germany and back escorting B-17s. These would be nine hour missions where he would bring a couple of empty coke bottles to piss in. Nine hours of holding onto a stick attached to a 1200 horsepower RollsRoyce Merlin engine. He had to fly over the Channel twice knowing if that engine quit that he had seconds to get into a raft before freezing. He would fight Luftwaffe pilots that were trying to destroy our bombers before they could get their payload to it's target, while trying to keep his plane in the air and not colliding with another. He also had to deal with flack and the Luftwaffe again on the return flight. If they would spot a locomotive or other enemy target on the way home they would take it out with the 6 50 caliber machine guns in their wings. Landing a P-51, after flying it that long, wasn't exactly a sure thing either, a lot of guys lost their lives making mistakes at this point in their mission.
He flew for the U.S. Air Force for 29 years before retiring and flying another 20 years as a corporate pilot. He was married to my Mother for 57 years, raised 6 kids and was the most honest and decent man I have ever known. If he had heard someone say he was a ***** for being an United States Air Force pilot, he would have laughed at such an ignorant ass statement and let it ride, he knew better than to waste his time trying to educate a neanderthal.
Are you sure he was in the "Air Force" during WWII? Cause im pretty sure the US didn't have an air force during that time period.

But anyways...Its like what everyone else has said. it depends on wat you want. if you want hardcore training and loyal officers that treat people with respect and are willing to put their lives on the line for you during combat, then pick the marines. If your into flying, and more of a laid back kind of person then pick the Air Force.
Wow, with that type of useless need to differentiate between my father's service in The Army Air Corps, The U.S. Army Air Forces and the United States Air Force, one would think you had a keen need for perfection in detail. Looking at your post and the amount of typos, misspellings and just plain incorrect usage of words, I see that you obviously aren't really worried about detail. Was this your (not Ur) attempt at a "gotcha"? In the 50 years I spent around my Dad, he never used any other name of the armed service he served in than the U.S. Air Force........ I certainly didn't feel a need to differentiate. You might want to check with any member of Germany's Luftwaffe or Japan's pilots from WW2 that are still alive today and see if they think the United States didn't have an Air Force.
You could also say that if you want to be treated as an adult individual and receive training that will not only make you very proficient at your job but will also give you skill that will help insure a job in the civilian life you will eventually return to, join the U.S. Air Force. If you want to be in a fraternity where you are encouraged to lose any sense of individuality and become a different life form that governs every decision you will make the rest of your life, become a Marine. I have respect for those that have chosen to serve in the Marine Corp but just don't care for the labeling or the "bad ass" attitude, not for me.
But here is an example to show you what both are like. Ur in a bar and You see an air force officer and you ask him wat he does for a living. He says, "Im in the Air Force"
then you see a marince officer and ask him wat he does for a living. He says, "I am a MARINE"
That's an adorable story, exactly why I, as an individual, wouldn't want to be a member of any organization that would cause me to describe myself as that organization. I never wanted to be in a fraternity, a gang or on a team either, team sports bore the shit out of me, would rather actually do something than watch others dribble a ball back and forth.
Now I guess I will receive the standard....... "I'll gut you with my Rambo knife for disrespecting The MARINES!......... I didn't, I said that the life isn't for me...... that response would prove one of my points though.