Congratulations!!!
I am Ghanaian and I who live and work in Ghana, so I am really happy to hear to have got into 2 great schools. And my post-MBA goals are eerily similar to yours.
Personally, Tuck is my kryptonite. I absolutely love that school. I visited there and it was awesome. There is just a warm feeling about the place even though it can be super cold. I hope to apply there this August so maybe you can give me some insights about the your application strategy since you got in.
I have a cousin who attended Darden and is now with a top 3 consulting firm in Nigeria. And he speaks highly of Darden. You have a tough choice and I don't envy you. I guess it all depends on how much debt you want to rack up after b-school. If you are looking to be involved in entrepreneurship - get investors into the real estate market in Nigeria - then I would go for Darden because you wouldn't have to worry about too much school loans when you start you own business.
I would like to have a one-on-one chat with your about you application to Tuck. How do we connect outside this forum? Thanks