mHz is clock speed for processors, lol. You're mistaking it for mAh. Anyway, that I think that really won't mean much, since it uses a 40nm Tegra 3 processor, as opposed to the more efficient 28/32nm (not sure; need to look up) Snapdragon S4. If it still had the same processor or even the Snapdragon S4 Pro quadcore, then the extra bump in mAh would be great.
Sent from the cockpit of Gurren Lagann