do you think these are different strains?

[polycultiv]

please, please look at these photos and tell me if they look like different strains, or if they're just developing differently. Thanks!

[the image reaper]

the leaves on the far-right plant seem to be a tiny bit more 'indica' in appearance, but it's quite normal to have a small bit of variation ...

[twoguysupnorth]

they look really similar, probably just the difference from one plant to the other. even the same seeds/strain can have slightly or more obvious differences

[luckychiken]

same strain....don´t you have a brother ?
they are like you but quite not like you.