i'v seen no problem with the rednesses. all plants with the coloring are healthy and maybe even stronger than the others,with more flowers from more nodes! if u ever lose a plant like ur saying i'd be surprised. 1 thing different is it might grow up higher faster than the others so raise it closer to your light until its levelled out with your others. thats all they needed. they'l make more yield,,,you'l see. don't prune the tops of them ones, u don't have to! and it is more likely more on the indica type,,,a little wider leaves has what u'v got.