I have both. I use the Super Bag for, well, duh, the heavy bag. It is a more dense glove offering more hand protection during intense bag rounds. I really like the wrist strap and it only comes in 12oz.
I use my 16oz Hook and Loop (Red) for sparring only. They are my favorite gloves and are GREAT for sparring. The padding is perfect for sparring and the wrist support is again, GREAT. I prefer to have seperate gloves to increase their life.