[DISCUSSION] Does Solar Power matter on Charizard Y?

[alwayswannafly]

Hi guys so I've been breeding for a competitive shiny Charizard Y set. And after 8 shinies I've stumbled on 2 Charmander:
Charmander 1: All 6 IVs with Blaze Ability
Charmnader 2: 5 IVs and DEF IV of 28 but with Solar Power 

So my question is which one fits better as Mega Charizard Y and which one should stay as a charmander?

Thanks for your input