SimilaritiesBoth models describe electrons arranged in energy levels.Both support the idea of a nucleus at the center of the atom.Both help explain how atoms absorb and emit energy.DifferencesBohr's model uses clear orbits like planets, while the Quantum Model uses cloud-like orbitals.The Quantum Model includes probability and uncertainty, Bohr's does not.Quantum Model gives a more detailed and accurate picture of the atom. SignificanceBohr Model: Helped explain atomic emission spectra and was a stepping stone in atomic theory.Quantum Mechanical Model: Foundation of modern chemistry and physics, helps understand chemical bonding and electron behavior.