Other than where they're fought, they share the exact same statistics. It is worth noting that Telsor and Delvax share the same name in Japan, テルヴァ. For whatever reason they were given separate names in the English localization. The Dorntak and Hopril enemies are also similar in the respect that there are two different versions of them but share the same statistics but also share the same name in Japan. The Hunter enemy is also similar to the aforementioned enemies in that there are two versions of them but unlike them, all Hunters share the same name.