@SuperStallion These sorts of e-cig suppliers sell branded e-cigs to keep users from knowing the true make and model of their products. You would be much better off ordering from a reputable supplier that does not hide the identity of their product with their own branded name. They pay the manufacturer to print them with their Brand, in doing so, this keeps customers coming back to them and only them for supplies and replacements. I would suggest ordering from suppliers such as vaporkings.com. They will ship same day providing your order is placed in time to get it out. They have great prices and customer service, and with them, you always know exactly what you are getting.
As far as vapor production goes, this more than likely has to do with the e-liquid, than it does the device. You can add some VG to your mix to produce thicker clouds of vapor.
Also, I would suggest ordering e-liquid and refilling your carts rather than buying prefilled.
In reference to two piece e-cigs, these are typically known as cartomizers. The most popular and well known of these types are the KR 808 series made by Kanger.

to ESF.