It's impossible to compare TH feeding times between inidividual feeders-there is an adjustable gap between the bottom of the hopper and the motorized feeding tray below-which is a great feature, and lets you use different sizes of food very efficiently-but the feeders all seem to have slightly different gaps, which allow very different amounts of food to reach the throwing chamber.

A couple thoughts-
Fish are pretty much gorging right now, prespawn in most of the country but possibly post spawn for you. A better measure of how much food you're using might be bags/month of food you're using...CC are serious pellet hogs, if you've got very many, and of any size, they'll eat you out of house and home. And your CNBG are no slouches, either.