You are asking a very open-ended and foggy question. The only service that has both fighters and attack helicopters that in which the selection system can be remotely compared is the Marine Corps. And you have to be a Marine before you even get to that point. The term "how competitive" is pretty squishy.....as in what do you use as the metrics.? You compete for everything in the military, no matter the branch, and a lot of it depends solely on timing and the needs of the service when you are up for airframe selection. Such as, if the day you are on the assignment block, if the AF needs a lot of transport pilots and no fighters, guess where you are going. If on that day, if the Navy needs a lot of helo pilots rather than fighter pilots, guess where you are going. If the Marines, on that day, need transport helo pilots and no attack pilots, guess where you are going. Now combine that with the Navy's practice of taking the top performers of their flight classes and making sure to sprinkle them around all of its aviation communities to prevent some not-so-popular community to become a statistical dumping ground for the bottom of the class, and there is another whifferdill. You have to accept the hard fact that you are an officer first, with an aviation specialty second and that specific specialty may be beyond your best efforts. You also have to go into aviation with the attitude that no matter what airframe you are flying, you will be the best in that community and the best officer your peers and enlisted troops will have. The aluminum that is wrapped around you is only the tool of your role of an officer.