Maine lobster and Australian lobster differ in their physical appearance and taste. Maine lobsters are clawed lobsters, typically characterized by their large claws with meaty claws and sweet, tender tail meat. On the other hand, Australian lobsters, often referred to as rock lobsters or spiny lobsters, are tail-only lobsters, with meat that is firm, sweet, and delicate in texture. Additionally, Maine lobsters are typically found in colder waters, while Australian lobsters are found in warmer waters. The taste also varies slightly, with Maine lobster possessing a sweeter, more succulent taste and Australian lobster having a more delicate flavor.