here are thier stats: hp 13 / hp14 atk 7 / atk 7 def 7 / def 7 sp.atk 7 / sp.atk 7 sp.def 7 / sp.def 7 spd 8 / spd 7 both are lv2 both have Bashful nature their currently on Emerald I'm going to migrate them heartgold and ev train on there then evolve them in a charizard.
When they are trained, I think the one on the right hand side would be better. Here is a move set for Heart Gold: Flamethrower- Learned at level 47 Brick break-TM 31 Swords Dance-TM 75 Shadow Claw-TM 65
You don't know if one will be better than the other in the future, as they're just at Level 2. I would just choose one with the higher stats, which is the second Charmander.