<p>My daughter also got into UChicago and Tulane (and got a great scholarship, but nothing near a full ride). She ended up choosing UChicago, but it was a very difficult decision. If the above posters are correct, Tulane has a fabulous geology department, so that might make the decision for you. One more consideration for you - many people end up living after college near where they go to college, so if you prefer the South to the Midwest, that might be another plug for Tulane.
They are both great schools - congrats on having to make a hard decision!</p>