are your hives close together? being such young hive's you might have experienced drifting, you need to see if you have eggs in the hive you want to re queen, if so just change the hives positions, you know put the weak hive where the strong one is and the strong hive were the weak was, it happens to new packages more than most think. a frame of capped brood would help the weak hive also, but I figured the bee's would have drawn q-cells by now if the queen was bad, its hard to say because I cant see the hive.
the answer these few questions and that can help see if drifting was your problem, is the population a lot lower in the weak hive? do you see eggs or brood in the weak hive? how far apart are the hives? distance between the hives doesn't hurt but new packages can drift when hives are close and the same colors.
JP post at same time as me, he was just a little faster