Day 6: The second seedling has perked up quite alot now compared to yesterday. She seems to be facing upwards more. How ever theres big colour contrast between the two. The second seedling seems alot darker and one of her leaves is smaller than the other.... As if it was a different strain. Any ideas why this is?

The first seedling seems to be doing great despite the hole in one of her leaves.








Above is the comparison between the two. As you can see there is a major difference between the two. Whats going on? any idea as to why one of the leaves is under developed? Help would be gladly appreciated.