How 2 seeds of the same breed can be so different.

Also, what could be the cause of the right plant looking kinda unhappy? Giving less water or more water didnt make the leaves perk up at all.

what strain/ photo/auto try looking up phenotypes

Are you just wetting around the plant rather than fully watering the hole pot?
Would explain why the smaller one with the smaller root system is doing better

Im watering the whole pot when the weight is very light, i water untill i get some runoff. Strain is shining silver lemon haze feminized photoperiods. Its a lemon haze x skunk breed iirc. Both seeds germinated and sprouted at the same time.

shpongler said:

Im watering the whole pot when the weight is very light, i water untill i get some runoff. Strain is shining silver lemon haze feminized photoperiods. Its a lemon haze x skunk breed iirc. Both seeds germinated and sprouted at the same time.

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For a plant to breed with consistent results, it needs to be selectively inbred.

As for their current state, one could have slower root development for a litany of reasons. There's no real way of knowing. I've mishandled seeds that did great, I've had a gang of seedlings get the same treatment and one will lag behind for one reason or another.