Help my plants

So my plamts are 27 days old today and they are doing good but im just curious my plants are about 10 inches tall but are bushy as fuck have about 6 nodes amd like 8 to 12 tops per plant why are mine so pishy compare to my boy samestrain of olants under same kind of 600w mh but his are like 2 feet tall and one like 3 nodes and one top help me please explain the picture shows mine and his plants are the ones i lst and super croped to be the smae size

Your plants look stressed. Possibly heat

My temps dont go abover 84 though it average is 76

biggest killer of yield has to be overwatering

allow them to dry out ...hard

just as they wilt is best

more 02 in the soil would be good here

add 20% perlite come potup time to get that

good luck