White Widow, with pics Must see. in flowering. need a suggestion

hey guys, below are my two babies, i used the FIM and Low stress training method... Strangely enough, i Fucked up the FIM haha... never happend before, i cut it too high being paranoid ....

my concern though is another.

as you can see in the pics below, the one on the left has a nice dark green shade to it, whereas the one on the right is much lighter... they are fed through this water-pump system i created so they are recieving the same amount of nutrients all the time...

can someone suggest what might be the answer to this wierd situation?

cheers

everything works perfectly, i check it every morning