When do we use Brinson Model vs BHB Model?

I hope they would clarify in the question which one is used when, but I am guessing the default is BHB?
Only the allocation effect differs under both is that right?

You’re correct in that the only difference is in regards to the allocation effect. I believe the default is to use BF unless specifically asked to use BHB. But feel free to fact check me on that…