Well, the pocket twos are, in some ways, easier to play because you're primary objective with this hand is to mine a set on the flop, whereas with pocket aces you are almost inextricably tied to playing a pot with your entire stack. It's always interesting to see some players fold pocket twos or pocket threes under the gun. While it's a good strategy to see a flop with pocket twos, if the price is too expensive, pre-flop, it is probably not, statistically, the correct play.