Which Snorlax to power up

Wait for a better snorlax :) it will be time well spent.

if u want to use it for attacking gyms then go with first one but yeah the second one isnt worth powering up since the cp is so low

send them both to the professor, cut that crap of asking those questions here...

If those candies are burning a hole in your pocket, power up the higher cp snorlax. As a gym defender cp is really all that matters. In my experience, if you plop a ~2000cp snorlax near a top spot on a 5+ level gym and it'll be there for a while regardless of iv or move set.

Otherwise continue waiting. Definitely don't waste candies on a snorlax that's far from 2000