FB runtz- Pheno difference based on height?

[Organic_Auto_Canuck (OAC)]

Hi folks

Growing this fastbuds forbidden runtz first time. One seems to be double in height early on. I think this is a hybrid strain ....could this mean this one Is more sativa dominant due to its greater height? Also, what signs when pheno hunting are telling other than height? Pheno hunting in the sense of different smoke effects rather than cloning. I like to clone photos mainly.

Thanks

 

[PotDaddy]

Could be different phenos but it could also be one is just slightly ahead.. I have seen the Runt become the beast of the tent when all is said and done.