Not much. They really do hold their performance better. As for the contest, post your order # here:Gonna do that right now.
2 questions capt - you said you use the IMR's in yours right? Is there really any difference in run-time you think?
& Are you entered in the contest automatically?
http://www.e-cigarette-forum.com/forum/e-cigarette-suppliers-forum/171012-aw-batteries-pila-chargers-super-t-great-prices-super-selection-117.html