I don't like Zone in general. Era contains more content than Classic, but the pay to play part is what Classic has an advantage over. Let's face it. Without a good gun in Era, it's not much of a competition. And with good guns, comes big money. Also, the amount of bullets flying on your screen and the difficulty to dodge them makes it all the more irritating. You can use melee weapons, but good luck getting close to a player with a high damage gun. In Classic, everyone has an overall equality. So I would have to choose Classic.