Difference between 2 same strain in same conditions

Hi,
i have 2 plants each in 25L soil bucket... Soil is plargon royal mix...
Im usin ghe 3 part series and some aditives like diamond nectar and cannazyme.
I water them evry 2 days and feed them evry 4 with 80% strenght solution... and ph 6.8-6.5
Im using tap water (my tap water is @ 210ppm)
They are in same space same conditions but they look so different 1 plant is looking healty buth other is looking stunned and unhappy...
I do alot of LST, fimm and topping on both... any differece is i broke 1 of lower steam on worse looking plant but node is looking cicatrized nice... It happen to me before but plant wasn't suffering at all...
The strain is Amnesia Haze form RQS
Any idea? i dont think is only pheno difference...

more pict ...

The light one looks like it could use some cal. mag.
I'd say looks nitrogen def. but it's all over not from the bottom up.

yea its all over the plant... steams become hader and darkest on this one... the healthiest has more flexible steams and not so dark... leaves are more jagged and thinner ... color is anyway already seen in the photos that is not ok... seems like some heat/cold stress but... why only on 1 plant in same room