Currently I think 320 is quicker to dfw, though that could change tomorrow. 320 is fly by wire, rate command; I like rate command over g and aoa. Makes for a very easy flying aircraft. Some argue they are less fun, and I agree as it is very simple to fly; doesn't take much skill. There is much more room on the 320 and it has food trays. Side stick versus yoke. Quieter for the most part in the 320. There are some PVI things and fms things I like better on the 73; but not enough to overcome the ease of flying and comfort in the 320.