1. Revali's gale has many more uses than Mipha's grace, for instance, can be used to rain bomb arrows which would cripple any self-respecting Lynel or boss, whereas any self-respecting Lynel or boss can easily cleave through even the extra hearts Mipha's Grace gives.
2. His bow, the Eagle bow, I think, is better than Mipha's Trident.
3. Revali is just simply more awesome in my opinion (no idea why). And his standoffish attitude towards Link is fun to watch.
