Similarly to the Ganondorf amiibo with The Legend of Zelda: Twilight Princess HD, the Falco amiibo with Star Fox Zero will give you an additional challenge by unlocking the Black Arwing that takes three times as much damage, but allows you to lock-on to two enemies at once. This is definitely a much more offensive option. If you’re already really good at avoiding damage, this might make things easier with the multi-target lock-on.
You can take a look AbdallahSmash026’s recorded live stream below to see the amiibo in action. Not only does he tap the Falco amiibo, but you can get a quick look at the Retro Arwings you get from using the Fox amiibo, too. You can see this just after the 9 minute mark.