No they are not. First, TH is a character meal and Boma is not. TH typically does have one or two of the same African inspired items, like the bobotie but the selection is much smaller in TH in my opinion. Boma has a larger variety.
If you want the character interaction and want to stay in the park, then TH. It is very good.
If you just want a really good breakfast buffet with variety, with African inspired foods (and regular) then I'd say Boma.