q's about my seedlings

i have 2 seedlings both with 4 leaves and the next sets coming through now. both look proper healthy but 1 of them has her 2 main leaves are massive compared to the other plant. why could that be? because its gunna be a amazing plant or because 1's a male even though i got feminised seeds?

heres a video for it i uploaded today
http://www.youtube.com/watch?v=D8Woyp-IjyA&feature=channel

when growing from seed there not clones. every seed has its own genetics and just like us no 2 will be the same. when starting a new strain from seed i like to start at least 3 seeds and grow until i can get clones. once ive got my clones taken and alive i will flower the seed plants to see there sex and what there potential is gonna be. by week 6 you'll know which phenotype of your strain you wanna keep. my best cross has been a white widow male crossed with a kali mist female.
the seeds that came from the female are wonderful, after goin thru the above process i now have a strain that has all of the widow looks and smell with the very long lasting high that one gets from the kali mist.. since ive created this from my own hermied male and wonderful russain mother i named my strain
"larroplain" as my name is larry and the high my bud gives is like flying ina plane. and people ask for it by name around my circle lol lol heres a pic of my larroplain

Way to early to tell sex...from seeds most seedlings will look different..out of 4 seedlings i have only 2 look similar and all the same genetics