I think I'm in the minority here on the Dis but I didn't love Boma. I'm not a big fan of spices that I associate with desserts (cinnamon especially) in savory dishes and a lot of Boma's offerings fall into that category. Tusker House, on the other hand, I loved. The menus are similar but the preparations and seasonings different enough that each stands alone, and TH was much more to my personal tastes.
Also, transportation after dinner at AKL can be a pain if you don't have a car. Transferring at an open park or DTD after a long day isn't worth the hassle, so if you choose Boma and are relying on Disney transportation I'd strongly recommend calling a cab.