Dusty-yeah,its just much more satisfying somehow,isnt it?
Naz-its hard to say mate.there are just too many factors to consider to say for sure...
individual cart quality,depth of drag,how you smoke,how you heat the atomiser before the main drag,how your atomiser performs etc...they all play their part,i think.
like dusty,i top up constantly also-as soon as i notice a drop in vapour...and i change to fresh batteries regularly too.
i dont really bother to measure it.i figure what you get-you get,it differs,and theres not a lot you can do about it except top up..its just not an exact science,im afraid.
id say that for me personally,the way i smoke and the hit i like,and if i dont top up...the penstyle cart lasts me maybe twice as long as the mini--approximately.
as i said,theres so many factors involved,that personally i think its just not possible for anyone to be totally definitive about this.