Even the current NG cockpit avionics are more up to date than the A320 ones. That said, both do their job and one learns to live with miniscule screens, only one layer of information at a time, no vertical situation display and no navigation performance scales to name just a few things.
Of course, the overhead panel is archaic and the lack of an EICAS is really weird, but apparently we have to thank boeings biggest 737 customer for that.