I think it’s worth keeping in mind that if the action A’s expected value is higher than B’s, then B can never stochastically dominate A, and there’s (in theory) background uncertainty according to which A dominates B. So, if you have enough deep uncertainty about the background uncertainty and entertain multiple distributions, A might be better according to at least one, so that’s a reason to prefer A, breaking the indifference.
On the other hand, you might also have deep uncertainty/complex cluelessness about which has higher expected value, anyway.
I think it’s worth keeping in mind that if the action A’s expected value is higher than B’s, then B can never stochastically dominate A, and there’s (in theory) background uncertainty according to which A dominates B. So, if you have enough deep uncertainty about the background uncertainty and entertain multiple distributions, A might be better according to at least one, so that’s a reason to prefer A, breaking the indifference.
On the other hand, you might also have deep uncertainty/complex cluelessness about which has higher expected value, anyway.