Gallade is a Psychic/Fighting-type Pokemon with superior health and physical attack stats, trading off for poor physical defense and special attack. Gardevoir is the opposite bolstering incredible special attack and unique defense stats. In the end, Gardevoir is a much more versatile Pokemon. Its dual typing of Psychic and Fairy-type gives it an edge as Fairy-type is very powerful. Gardevoir also has better abilities and mega evolution.