One major difference between these two animals is the Sea Lions will have prominent ears. Hind legs limb can be folded forward. Time on the land, thus making the fluent movement. There are no seals the ear. Hind legs limb cannot be folded forward to make time on the land, so no moving, agile sea lion-like guys.Sea Lions will have prominent ears. Hind legs limb can be folded forward. Time on the land, thus making the fluent movement. There are no seals the ear. Hind legs limb cannot be folded forward to make time on the land, so no moving, agile sea lion-like guys.