Right now I would be feeding sugar syrup especially if your trying to build them up. The syrup stimulates the queen to lay eggs where as the candy helps the bees in winter not to starve. It really does not do much to raise brood. Question though before you give them more sugar syrup, is this an established hive and are you going to take honey off from the hive? If so I would let them start getting honey by themselves other wise it will turn up in your honey. If your trying to build up the hive keep giveing them syrup.
Dan
Dan