do you mean a battle between the sharks? Or a battle between the movies?
If it's the sharks, then the megalodon wins all day every day. The thing is simply too big and too strong for the enhanced makos to damage even with smart precision attacks. They lack the bite strength needed to damage the Meg's hide, plus the giant is actually very fast for a creature of it's size.
On the other hand, comparing movies, I still like DBS better. While the Meg is definitely the best among the more modern shark movies (Including DBS2 mind you) the original DBS had a lot of thought and planning put into it, and it's effects, both practical and computer generated were top notch for it's time.
Never let anyone else define you. Don't be a jerk just to be a jerk, but if you are expressing your true inner feelings and beliefs, or at least trying to express that inner child, and everyone gets pissed off about it, never NEVER apologize for it. Let them think what they want, let them define you in their narrow little minds while they suppress every last piece of them just to keep a friend that never liked them for themselves in the first place.