Pride or Greed you say, that is a simple one for me... Well all around, our of all the sins, Greed is my favorite. And this is the same no matter what version we are talking about...
~ In the Manga, what little of it I have gotten to read, I adore his character.
~In the '03 Anime series he is pretty spectacular. I love that character along with his chimaeras. The character development is awesome, though his appearance is short lived I really liked his character.
~With Brotherhood I really loved Greed in Lings body, the character development was spectacular.
To me Greed is probably the truest to his 'Sin' than the others; He doesn't care about anyone's goals or agendas other than his own, he manipulates others into doing things for him and he even becomes more of a 'neutral or chaotic good' character because those he looks as important to his plans he regards sort of nicely. Then in the end he sacrifices himself for them, it's a total noble thing in my perspective.
As for what they are made for Pride probably wins that one(in all the versions)- but he is more of a pawn than Greed lets himself be which I think that in the actual development of 'Pride" he should have had more of an independence streak in him as well.
So simply: I like Greed MUCH more than Pride, regardless of version you want to go by, because of character development, powers and stance.