I have a homework problem that asks me to interpret the two curves for when the Fermi level (Ef) is 0.25 eV. I ploted the two graphs and both of them look nothing alike when E < Ef. But both plots predict a probability of essentially zero when E > Ef. I was wondering why is there such a large difference in the beginning? Is it because the MB predicts that almost all the electrons will in the lowest state, while FD takes into account of the Pauli Exclusion principle? It seems that both plots are essentially the same when E is the conduction band energy level.