Sent Wrong Seeds?

[buzz5599]

Ive ordered from CKS 3 times.
In the Spring I ordered 5 Purple Kush and sprouted them.
All my plants look exactly the same but one looks completely different.
Hoping someone can help me out

Pic below:
the top one is my PK
the bottom one is undtermined

 

[TorturedSoul]

It's not a homogeneous strain - there are at least two different phenotypes.