Two differences in the decorative styles of the Sultanate period and the Mughal period are as follows:
1) The Sultanate period introduced arches and domes. They were used only till the end of this period.
2) Calligraphy, arabesque and geometry were used for hiding rather than revealing the structure in the case of the structures of the Sultanate period. The Mughal period, on the other hand, fused the local architectural style and the Persian architectural style and calligraphy became more refined.