Without getting into a debate about the whole "global world view of education" the IB program contains other things AP does not. Specifically A 4000 world essay, and service projects. Also, The structures of the two programs are very different. Think of AP and IB this way: AP is a smorgasbord: pick the courses you want, leave behind those that tempt you less. IB, by contrast, is a “prix fixe” menu: you get all or nothing. There is a range of choice within IB, but the entire high school curriculum is dictated by those initial choices. Again I'm not advocating IB and he hasn't been accepted just really interested if anyones kids were in IB and how it affects baseball. Those who are interested can go to just about any college's website and compare the credit transfer policy for IB and AP. Some schools may favor one over the other or be the same.
Triple- from what I see a typical AP student could take for example their senior year- AP English AP chemistry AP calculus and then regular history, gym and Heath for example. Conceivably they would have more free time than a full IB program. Of course a student who took all or mostly AP classes would have the same time management challenges. With AP you have the option to do that. With IB you don't have the option to lessen the load.