Stock charger stick is 2.5Ah, I believe. (Used to be 2.2, actually!) So it depends on your AAs; the higher voltage will suck more current, so it might come out pretty even with Eneloops or something. If there is a difference, it would definitely be in favor of the charger-sticks.
If you use aftermarket 1/2D cells or sticks, though, the 10x1/2D pack pulls ahead -- you can get them at least 3.5Ah, maybe more. Don't know how you plan to charge them (is keeping them in sticks of 5 important?), but if you buy them loose you could easily use 9x1/2D.