User blog comment:Lord Zeref Dragneel/Is there anything more powerful than Fairy Heart?/@comment-26451407-20151130081045/@comment-817603-20151205223110

I don't think he's stronger. Looking at the Tartaros battle, Natsu was having difficulty beating Tempesta. He was only able to overwhelm Tempesta when he entered the Lighting Flame Dragon Mode and who knows if he could beat Tempesta if that battle continued on. However, when Laxus was fighting Tempesta, he was able to beat him without entering any special mode, and he was fighting with anti-magic particles inside him as well.