Get both. One each side - you can't go wrong then
If Dennis does Bellows cargo pockets they will fold flatter when not full so are a better option.
I have a bix box-type pocket and to be honest, with a twinset on, having a pocket isn't that much different to the streamling. Added to that, if they are on the outside of the thigh they are in the slip-shadow of your shoulder, so again their effect is reduced.
HTH
Lou