Tigeress,
I only took the test once so I don't have much experience, but here's what I expereinced. I took the test in the recruiting office with three other people. We all sat at a big table so two got form one and two got form 2. That way the people across and next to you were working on a different test so you can't cheat. As for one being easier than the other, I can't make a comment on that, but you have to remmember that these are standardized tests, just like the SAT, MCAT, etc. The only thing that matters is how you score relative to everyone else who has taken that exam. Therefore if one exam is easier you will score better but so will everyone else who has taken that test so they will standardize your score. Besides from the look of the test books the navy has given out these exams thousands of times, I'm sure they know which test is harder and will adjust the scores properly. So I would say don't get stressed out over which form you get, it's just one more thing to distract you from your concentrating on your final goal. Just relax take whatever form they give you and do your best. Good Luck!
-Jason