The difference between Chilitepin (on the left, and chili pequin (on the right).
Not much difference between the two. It seems like they are commonly mis-identified, even on seed packages.
I found some good info in this page:
It's a Dry Heat: Get to Know Chiltepin and Pequin Hot Peppers
Ah, good to know. Mine is closer to the chili pequin. Those look HOT.