I'm not sure why a super soldier would need more energy than another person. Capt. America and Hulk have much more stamina than most human beings and some variations in comics didn't need sleep or eat on a regular basis.

I would go with super soldiers because they are cooler. If they all have different powers though, then it could be a lot more difficult if a lot of them rebel. Someone also mentioned super soldiers going against suicide missions. Military leaders had tricked soldiers into that situation sometimes. Still could apply to super soldiers.