What filler would be best for nasolabial lines?

Q.
Hi dr,
I would like some advice on which filler would be best for nasolabial lines. I am 19 years old and don’t have wrinkles but recently the expression lines going down from my nose to mouth have become deeper, and it has given my face a more gauntish, harder look, and I have very faint marionette lines because of this too. Where as before my face looked alot fuller. I think this is from poor diet, smoking and drinking too much coca cola.The expression lines don’t look even either, and the one on the left side of my face goes straight down, whilst on the right side it is curved and slightly softer around the mouth. I am choosing between restylane and juvederm. I like juvederm because I read it gives a more softer look than restylane, which is what I would like, but am worried because I heard juvederm tends to spread out more and go into other areas. I don’t want it to spread to the cheek area as I already have very full cheeks and it will look weird. I want it specifically for the nasolabial folds, too soften them. I want a filler that will look natural and subtle and just make my face look the same as it used to and not really different.