The darlington output buffers on the LM13700 are different from those on the LM13600 in that their bias currents (and hence their output DC levels) are independent of IABC pin. This may result in performance superior to that of the LM13600 in audio applications.
A key difference between the LM13700 and LM13600 is that the former's Darlington buffers have unbiased bias currents and output DC levels, unaffected by the IABC pin. This characteristic may provide an advantage over the LM13600 in audio applications.