Trust me, you do not want lips as big as in that second pic... that won't look natural on you!
I would recommend paying a hundred or so more for Juvederm ultra plus, which usually lasts a bit longer. When I had mine done (I no longer do them now) I would use around 0.6 cc divided between the top and bottom, which is not much at all. Start with a little, you can always go with more later. Doctors will save a syringe for you too if you only want to use part of it.
That's good to know. Do you mind me asking how long Juvederm Ultra Plus lasted for you? Is there a reason you stop doing it?