Carolina Reaper Peppers Ripe?

I have two questions about two different types of peppers.

This Spring, I bought two pepper plants from a local nursery, one Carolina Reaper and one Ghost Pepper.
They were about the same age, I transplanted them into bigger pots, and they've been growing close to each other all summer. See photos.

Q1:
The Carolina Reaper has several peppers that are turning red.
Judging by the photos, are they ready to pick now? (Or should I wait? Do they get any redder?)

Q2:
The Ghost Pepper doesn't have any peppers on it. It's had flowers and the plant, itself, looks healthy.
Why did this plant not produce any peppers?

Hi, David

I thought that I would give your topic a little bump with these threads:

https://permies.com/t/115531/Carolina-Reaper

https://permies.com/t/156612/Ghost-Pepper-Chile-Plants-Hybrid