I had all mine the cold way last winter and had no problems, they all came through..........even 1 drone layer !
This year I have some either way, this suits me with my present layout as it depends whether I work at the side or from behind the hive according to the stands I currently have. I am not expecting to see much difference after all I have a 16'' square mesh hole 20mm below the frames.
Also had a couple of nucs last winter which had 14x12 frames in and the bottom of these was visible through the entrance hole as the nucs were home made by their previous owner and could house either std or deep national brood frames, I imagine the bottom of these frames was certainly cold in the -18 we had at one point
Pete D