[MetalMan]

I just drew up a quick diagram that shows the differences in the connections. Personally, I think the one on top is better because the group of cells in parallel function together as one cell, making balancing a lot easier. However, the one on bottom would work best if you used smaller packs in one vehicle (like a 1/18 car) that were then paralleled for use in a larger vehicle (like a 1/10 car).