Greg,

If you getting into 3D seriously, (I don't think AA offers this) OT2 will allow you to select different McKenzie, Delta, or Rhinehart targets and will show you exactly where on the scoring rings you will hit when you input your estimated distance, and actual distance. It can also account for wind speed as well. This doesn't sound all that interesting unless you decide to really make a committment to getting better at judging yardage for 3D.

Based upon the advice of a guy I am working with who has an IBO semi pro world title and ASA semi pro shooter of the year title, I am working on yardage guessing by walking in the woods with no bow, just a range finder and my shooting journal. I pick 30 random objects between 30-50 yards and write down actual distance and distance I guessed it for. When I get home each night, I upload the profile for my 3D bow setup and then go into OT2's simulation mode and can plot out exactly what I would have scored assuming perfect shots. Everyone I know that got really good from the pro stakes at the national level says that you have to practice this judging with no bow in your hand, and this is the best way to have hard data that I have seen to track improvement.........

Based on this feature alone, unless AA has it as well I would look heavily towards OT2. I do know AA is accurate though, lots of pro archers prepare tapes and cut charts off it for field archery and have done very well. I know Doug Williams Jr. promotes it heavily and he might just be the best field archer out there now, and nothing will test the accuracy of your sight tape like field archery.