Indicas are generally, [almost always] more compact. Then you've got your lights. The wattage, lumens and how close the lights are to the plant will make a big differnce.

Nutes will make some differnce, but not as much as the lighting. The nutes are more for just making the buds bigger, or increases calyxs.

But, if your buying from a dealer no doubt it's probably been compressed at some point, and then theres no real way of knowing if it was how it was grown, or how it was stored.

Theres lots and lots of factors. LOTS!