7 weeks flowering - 2 strains?

hi,
It's been 7 weeks since I switched to 12/12.
I have 2 fems - they look like 2 different strains to me - What you think?
And this is where the problem shows up -
I think they have different maturing times.
I am planning to use RIPEN from GHE to try to line up harvesting in time but when to start?
Should I flush after using Ripen?Or is RIPEN acting like flushing agent?
Advices appreciated.
Adam

not sure about the ripen question, i just flush with plain water.

as far as the strain question, i have a question....did the seeds come from the same bag of weed or same seed vendor? if so, you have the same strain that has different phenos. every stain will have seeds that produce plants with different traits. i have 2 bubblelicious that are completely different. a good strain will only have like 3-4 phenos, while unstable strains that have not been backcrossed many times can display many many phenos each with different traits.

i would just cut them when each plant is mature, so if one takes longer to finish, then let it grow longer than the other.

I start to flush one week before my estimated finishing date, if this helps..

seeds came from WEEDSEEDSHOP.COM.
It was INDDOR FEMINISED MIX.
Thanks
Adam