You won't always see eye to eye on some of the more fundamental subjects -- your values and beliefs regarding money, for example, or spirituality, or your personal philosophies of life; and this could prevent you from being able to fully support each other in all you'll do. In fact, you probably won't even be seeing each other accurately. Instead, you'll both see what you want to see.
You'll both like and respect each other, but you'll still project unconsciously. Though your impulse might be to try to ignore your differences, you should both try to face them down and see if you can't find some common ground, because you stand to gain a lot from this friendship. Another thing you two need to be very careful about: overindulgence! You two can really egg each other on when you're together, resulting in some 'morning after' moments that could leave you shaking your heads.