Making a vapor cloud is a combination of power, air flow, wicking, juice, and lung capacity.
High vg juice, more vape.
Power must be high enough to vaporize the juice but low enough not to burn it.
Air flow must be balanced to allow cooling of the coil but low enough to prevent vacuum loss and poor wicking
Wicking must be able to absorb sufficient juice quickly enough to avoid burning.
The difference in yours and you bud's pv may be as simple as he got a better pt head than you or he has more lung power.