In my finding I found with both 115 weapons that the BLM has around 30-40 more DPS on an ST. AoE, we shouldn't even be discussing of course since that one is very obvious. Of course, once you actually optimize the stats for SMN, the gap will be a lot closer or maybe not even existing. However, another issue I have encountered is that BLM sustains a lot better than a SMN. It would seem that SMN for me drops to around even 50 DPS lower than BLM