This is hard to answer because GP has now changed there cells and by doing so i'm sure they need to be treated differently than 3300s. I know that when we tested the original GP3700s they didn't hold up there runtime compared to the IB3800s.
Also while I was attending the DHI cup I saw allot of racers using GP cells putting new packs in the cars while we were using 3 packs of IB3600s for the 5 qualifiers on Saturday and 2 packs for the 3 A mains and Paul Lemieux ran his fastest run in the third main and that was with the same pack he used in the first main.