dont think theres many pros and cons, its just which one youll like best. i didnt like how the aquapod had a cheap stand, and i liked the way the biocube looked. the biocube has a way better stand in my opinion.
the extra gallons in the biocube is good too
factor in the cost of the tank and stand then look up how much sand from your lfs might be, maybe like 10lbs or something for a small tank, plus how much itll cost you for live rock.. usually about 1-1.5lbs per gallon, its up to you though on how much rock you want.
people usually end up modifying something in the tank like the pump, lights, cutting something to have more flow, or peeling off the paint in the back to make the back compartment into a refugium by adding a light to the back of the glass on the tank