We have constructed the E-T phase diagrams by drawing the field-induced birefringence contours in the prototype MHPOCBC and MHPOOCBC binary mixture system. The obtained subphase evolution in the diagrams clearly indicate that there exist some additional biaxial subphases other than the ordinary ones with three- and four-layer superstructures, and that the field-induced deformation of uniaxial SmC alpha* in MHPOCBC occurs quite differently in the high and low temperature regions. We have discussed the origin and structures of the additional subphases and different types of the field-induced deformations in terms of the extended Emelyanenko-Osipov model together with the Devil's staircase character of field-induced unwinding process of the SmC alpha* a short-pitch helical structure published by Yamashita et al. in these Proceedings.