Which one would you keep?

[zues]

Not like you're going to get rich off a 0.1 Pastel hatchling, so I would hold both for 6 months and see who eats better and holds their color.

Another advantage to holding both for a few months is you will get to know eating habits. One may end up being a garbage disposal while the other is hit or miss. At six months one could be twice the size of the other depending on eating habits.