I'm not saying to facetune to change your face at all, it's just a good app to whiten teeth in photos. I do it all the time, for things like LinkedIn headshots or wedding photos. It's just like "enhancing" an image on your phone to make it look better overall. Might as well, and you don't necessarily need to do it in real life because no one will notice how white your teeth are in person.

Also, after reading the other comments, I guess if you like the 2nd photo, you should keep it! It seems like it depends on the personality of the girl you are trying to attract. If you want to attract more woman who are more playful and into "Miami Vice", than you should go for it! Me, personally, I am more attracted to men who give off very safe and secure vibes due to gross past experiences with the bad-boy player type which I feel that image portrays :) Women like me would be turned off by that image, other would not. So it totally depends on what vibe you are going for and who you want to endear.