Well, I play on emulators so I can't really trade with others so I'll have to choose 1 of them unless I cheat the other one which I don't see a reason to do since I despise Zekrom. Gold/Silver could get both Ho-oh and Lugia with the only difference being their lvls and how early you could get them.
I'm too lazy to waste cash on a 3DS, especially since I only want a single game to it. Yes, I'm looking at you HeartGold.