I used to have the CQB-2 and still have a Temperance. Both of these knives come with excellent carry sheaths. As hso says, the Temperance will cut better - it's a flat grind like a kitchen knife. It's not that the edge is better on the Temperance - it's just designed overall as a better cutter. For occasional utility use, of course, either knife will cut - they're both knives! But if you are going to process a deer, prepare a meal, or do a job that requires a lot of cutting - you'll be happier with the Temperance.
Although they have similar blade lengths, the Temperance is a lot bulkier to carry - the blade (and therefore the sheath) is wider, and I believe that the handle on the Temperance is longer and thicker. I carried the CQB-2 pretty often when I owned it, but I never considered carrying the Temperance - it's just too big for my liking. Some people do carry them, and like I said, the sheath is excellent. If you use a wide belt, I think that the Temperance comes with a standard Tek-Lok which fits wider belts than the mini Tek-lok that came on my CQB-2.
Even though the Temperance looks like a kitchen knife, it definitely is useful as a "fighter". I believe that Spyerco supplied Temperance trainers at some of its MBC "martial bladecraft" classes. That's another point to consider - Spyderco makes trainers for the Temperance, but Camillus doesn't offer trainers for the CQB line. If you carry a knife that may be used as a weapon, you should train to use it, and the best/safest way to train is with a trainer that is identical to the live blade.