First, when you say "In CCC you can pick a drive and it will clone all volumes on that drive", does that mean all volumes of that drive/device would be backed up at the same time? SuperDuper! cannot do that, as far as I can tell (unless it is possible to develop a script to do that, which I have never done). In other words, if I have a device (typically an external SSD) that has 3 Volumes on it (A, B, and C), SuperDuper! can back up each of those Volumes one at a time, not simultaneously. Does CCC behave the same way?
I guess my understanding is that the op wants to do the 2 backups separately, ie, backup each volume separately, and thus that is what I based my post on. It looks like (as expected) CCC can do that also.
But as for backing up/cloning both physical devices at the same time, no matter how many volumes are on each device, SuperDuper! cannot do that.