I've searched for this and couldn't find it, so here we go.
Gen III was the only generation so far to introduce more than one pseudo-legendary, giving us the Salamence and Metagross lines. Both are popular within the fandom and both take a lot of training and patience to raise.
In your opinion:
Who's more useful in a battle?
If they were to fight, who'd win?
Who do you like better?
Personally, I like both of them, but Salamence wins for me. The design is probably what ultimately makes me decide.