Rhino has it, all diesel at the pump now is ULSD. You can buy biodiesel blends at some pumps but it's all still ultra low sulfur. In winter the blend will be different as well, it'll typically get anti-gelling additives and has a higher cetane rating.

All DEF is supposed to be the same, it's 32.5% urea and 67.5% deionized water. I think PEAK has come out recently with a version of DEF that may have additives in it, but it may just be a marketing gimmick.