Forum:Zoma The Spirit & Ultimate Ancient Gear Golem

My friend and I are dueling and I brought out an Ultimate Ancient Gear Golem. He already had Zoma The Spirit on the field and in defense position. His life points are at 3600 and mine are at 4000. Ultimate Ancient Gear Golem was summoned by using a Polymerization. I attacked his Zoma using UAGG, which is 4400-500=3900 damage. Would we both die or would there be a victor? Let me know if you need me to elaborate at all, on anything previously said.