Torpor decreases fast, requires more resources to keep down, and is much more dangerous to approach and attempt to take down due to rebalance of tamed dino that were once OP (of course you can trap the dino behind a wall or something (the AI is a little dumb still). For example if you approach a level 30 rex on a level 30 sabertooth attempt to fight you will drop in 3-6 hits depending on where you placed your stat points. Also Wild dinos regain health and Torpor very quickly. so unengaging in battle for more than a set amount of time will result in lost efforts. Certain dinos will also flee from battle for a set time if they reach critical health, giving them time to regain stats.