To both questions, I'd go with girth, and yes, you can get both at the same time. If I were you I'd go with 3-5 hundred dry jelqs every day and on every tenth one, do a ten second horse squeeze. Girth baby.
If you are just starting Penis Enlargement, a simple jelqing regime will give you both, but probably a little more girth, which is what you need to become a freakin monster.