Bing
Smash Master
Just saying, you're comparing Falco's dair, a spike to Fox's dair, which is used for damage and combos(drill shines). Fox has the shine which is incredibly more versatile in comparison to gimping ability. it comes out faster, can be used as equally effective if using off of a wall-tech. and can even gimp will standing on a ledge,(wavedash towards opponent then shinespike). Falco's dair is ****, but i think that Fox has more options... And can recovery better.