IMHO you did not buy a good quality set. But then you also stated that you are not a professional technician so you really don't need a good quality set. Remember, you get what you paid for.
CH is definately a bargain brand for the DIYer and will make most of the work you do easier. There will be some fasteners that you will not be able to remove with your CH gun though. But do you want to spend the extra money to get a gun that will remove those stubborn fasteners the few times you run into them?
I am not intimately familiar with the specs on both brands so I cannot say which one is better. Most likely, either one will be fine for the usage you are going to put it through. One of the best things you can do to get the most for your money out of what you bought is to take care of them. Keep the air tools oiled regularly.
As far as your air ratchet is concerned, is it 1/4" dr or 3/8" dr? To give you an idea, a Snap-on 1/4" air ratchet is putting out about 25 ft-lbs of torque. 3/8" drive is putting out about 70 ft-lbs of torque. But remember, this tool is going to be tripple what you paid for your whole set. But for a professional technician, it is worth it.
Be happy with what you bought, take care of it, and it should hold up for you.