If I am not mistaken (which is always possible!), both Boma and Tusker House are overseen by the same chef, and the offerings are pretty similar. As such, I would give the edge to whichever suits your schedule better. Both are at the top of the WDW buffet class, in my opinion at least. If forced to choose, my gut tells me that Boma has the edge...plus that leaves you the option to eat at Yak & Yeti in the park - ha!