simple answer is that the bees don't care
I have decided to run all deeps for everything, but I am in the minority. it seems that the most common practice is to run all mediums as they weight of them is more manageable. if you want to overwinter with two boxes, then you're fine with the one deep and a medium, and the next hive you can use three mediums to be pretty much the same as two deeps.
Many people, myself included, like to have all of their gear to be one size. it makes things much easier when you have to swap a frame here and there, or move boxes and covers around.
After this winter, when all of your bees are up high in the top box, you can remove the one deep you have if you're really motivated to have only one size for your gear.
Many people, myself included, like to have all of their gear to be one size. it makes things much easier when you have to swap a frame here and there, or move boxes and covers around.
After this winter, when all of your bees are up high in the top box, you can remove the one deep you have if you're really motivated to have only one size for your gear.