Red
Meowth: Can LG in mart? 9f warp is also possible
Bellsprout: LGs are all shit, brock-fly candidate 1
Sandshrew: LGs exist in mansion and forest, some seem usable
Vulpix: Crazywarp
Pinsir: Mansion Crazywarp?

Other differences:
Muk gives Tauros, which could be useful especially if crazywarping pinsir
Red must evolve nido f as it can't afford nidorina (or get coins twice)
Red wants to manip nido f in safari zone
Red has completely different seafoam encounters, both horsee and slowpoke are fairly fast to get
red will also probably have different text pointers