IB is supposedly a step ahead of AP. I find AP tests harder, but there is more in-class work for IB classes. I dont think it is really that much work. I havent done anything this year (senior) and skied like 40 times. I hang out all weeekend, every weekend and shit still. I mean it is a lot of work, i'm not going to lie, and I dont know how worth it it is. All I know is I got into the schools I tried for, and I think a lot of it was because IB is so exclusive and not many people do it. I know lots of people who have dropped it and are only taking some IB classes and it works for them. Its really up to you.