Both have unlimited energy, and there are no legal implications. Neither will get through airport security. The lightsaber has one blade and you can choose between light blue, darker blue, green, red, or purple. Also, please explain why you chose what you did.
I picked energy sword because personally I think it's just more badass looking. Swish, swish, death.
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The Lightsaber is like, infinitely cooler than an Energy Sword.