Evolve ekans with higher CP or higher HP?

I have below two ekans. 1. CP 177 , HP 28/28, weight 9.28, poison:acid:10, poison:GunkShot:60 2. CP 170 , HP 31/31, weight 9.12, poison:poisonSting:6, poison:SludgeBomb:50

Basically second one has higher HP and poison type is different. I have 50 candy to evolve one of it. Which one do you suggest to evolve and why? does after evolve CP/HP be different? Please suggest.

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1 Answer

do not evolve any. wait to have higher trainer level so you will find higher CP ekans.