For me I used to wear a 15 in Jordan retros, only because I have a wide foot and they are cut like crap vs the OG pairs. I’ve tried to wear a 14, and they are fine for short periods after they are broken in, but wearing them for a full day forget it.
Air forces are a different story. I can wear a size 14 all day with no issues. I believe they are cut somewhat big, so true to size works for those.
For my NB’s I went with a 14 across the board on my 990 V1, V2, V3 and V4. Ended up selling the V2 & V4 due to them being too tight in the forefoot region. My V1’s I’m hanging over the midsole width wise. They are comfortable none the less, but for now they are my daily beaters. Personally the 990V3’s fit me the best all around. 8 pairs and counting!