User blog comment:Crimson Storm Mich/Future Units Preview v2/@comment-26944381-20170306152904/@comment-26944381-20170307035809

Stein: Heal, BB on hit, Status cure, Status protection, Water barrier, 2 turn miti, Crit negation, Heal on hit.

Kanon: Def boost, Atk>Def, Status cure, Heal, Crit/EWD/Atk, Def, Rec reduction protection, Thunder barrier, Def ignore negation.

Cardes: Def boost, BB on hit, Status cure, Status protection, Heal, Heal on hit, Drain, Crit/EWD protection, Atk>Def, Elemental miti, 2 turn miti, Spark miti, Dark barrier, BB gauge reduction.

He is a direct upgrade of both, but I personally see him more as an upgraded version of Stein than of Kanon.