I don't see any different version (all of them 14300.1000.160324-1723) but different EDITION/SKU, so they could be on the same thread.
Nice, I snagged a copy from TechNet. Strange that in the TechNet- Installation Guidelines - they provide a installation Key System Requirements and Installation (dated 11/24/2015)- They provide a different installation key.
TechNet let me d/l both ISO's but wouldn't give me any keys, just kept getting an error. Surely, they weren't over loaded by Server d/l's