I've only stayed at the Enchantment resort. But, it's all part of the same complex. Mii Amo seems a bit less dense, private, and is situated closer to the Spa. Plus, Mii Amo just finished a major remodel. Maybe trying to recoup? I'm not sure, but maybe Mii Amo is now considered their "club level"? I also believe it's adult only. If the price is substantial and bothers you, I'm sure you'll be fine in the Enchantment part of the resort. Might be worth a call /email to see why there's a difference.