Metalheads who consider Megadeth better than Metallica, Why?

I don't want to insult You at first place, I LOVE MEGADETH and I love Metallica too, but It always traps me the attention people who believes that MEGADETH > Metallica.

In this opportunity I want to, besides all kind of fanatism, we can have a healthy debate and tell your point of view of why do you believe that.