What's the difference between bootless and footless?

Bootless

Definition:

• (a.) Unavailing; unprofitable; useless; without advantage or success.

Example Sentences:

• (1) Elkjær was running down the left wing with the ball when he lost his right boot; he kept running and ended up shooting home with his bootless right foot.
• (2) But it would be remiss of us to forget the Indian national team, who qualified for the 1950 World Cup finals with their entire team going bootless.

Footless

Definition:

• (a.) Having no feet.

Example Sentences:

• (1) We report on 4 new patients with acheiropodia ("the handless and footless families of Brazil").
• (2) A genetic analysis is presented of data from 22 Brazilian sibships with cases of acheiropodia (the handless and footless families of Brazil).
• (3) For centuries since Herodotus, writings on those "footless lizards" touched on serpents, their types, appearance, habitat, anatomy external and internal, physiology, reproduction and venomy.