Scorpion and lobster. Are they close relatives? If you play, which is better? Is there any good comparison method?

Scorpions are similar in structure to lobsters. The only thing is that the scorpion's tail is poisonous and the lobster's armor is hard. Scorpion venom generally can't pierce lobster's armor. Lobster's big pliers are more powerful than scorpion's pliers. If the scorpion is caught by a lobster, I'm afraid it's over. Lobsters are fierce and aggressive, especially male lobsters.