There's nothing to talk into or out of. To help anyone find a particular bag, the first thing I ask is what is it going to be used for? What type of travel?
With the two bags you're thinking about, both are very well made and will stand up to tough conditions. But that's where they end. Look is different, functionality is different, design is different.
So, if you tell us the type of travel you'll be doing, that would help. Next, are you aware of the packing differences between the Aeronaut and the C-Ruck? The c-ruck is a top loader--a whole different way of packing. Are you okay with non-hiding backpack straps? The C-Ruck is smaller than the Aeronaut--which may fit your needs--and is 1 1/2 lbs heavier. Again, that might not make a difference to you.