Which is better? Red or Blue?

*shrugs* I don't know. Let's note their differences and their similiarities.

Well, for one thing, their Pokémon are different. For instance, you can't get these in Red :

Pinsir
Meowth
Persian
Magmar
Vulpix
Ninetales
Bellsprout
Weepinbell
Victreebel
Sandshrew
Sandslash

Whilst you can't get these in Blue :

Scyther
Mankey
Primeape
Electabuzz
Growlithe
Arcanine
Oddish
Gloom
Vileplume
Ekans
Arbok

SoooooOooo...*shrugs* That' the only difference between the games...only that they have different Pokémon in each version. -_-;

As for the similiarities :

Firstly, they're the same. It's not that in Red, you get to play a girl, whilst in Blue you get to play a boy. The entire layout is still the same. You get to catch Pokémon...fight 'em, train 'em. The gym leaders are also same. Nothing different 'bout them.

Secondly, they have the same fun factor. ^_^

So eventually, nobody wins this. All of Red and Blue are virtually the same. ^______^ But it's your choice for the games, so nobody's stopping ya from buying whatever version you want to have. ^_^