"Bail" and "bale" are the same fitting. American trade uses "bail," while the British usage leans toward "bale." There is no difference in meaning between them.
Visually Speaking
Animal motifs in contemporary fine jewelry span from literalist naturalism to abstracted silhouette, with said animal functioning either as the piece's central subject or as a reference held close. The distinction is one of intention: do you want to show your animal to the world or keep it on a leash?
Made With Purpose
Fixed and hinged bails answer different pendant needs. A fixed bail stays permanently attached. A hinged bail opens for easy chain changes, adding versatility along with more visible mechanics at the connection point.