I feel like Naga Morich and But Jolokia are related, but different. Different flavor, different burn profile, different shapes.
AFAIK, Naga Viper is an unstable f2 hybrid? I think it held the world's hottest record for like 5 seconds?
Ain't none of them able to hang with the current contenders, though.
I grew Naga Morich in 2017, and i love it. Tried to grow two plants out in 2018, but one died and the other one must've been mislabeled or a cross; it pushed out smooth yellow pods. Super disappointing. This year, I got plenty of Bhut Jolokia and Naga Morich seedlings started, for a better chance of success and for some sort of Camaro v Mustang, Coca Cola v Pepsi showdown. I gotta confess, I'm pretty biased in favour of the Naga but I'm seeking input from buddies who enjoy the SuperHots. Put it to a vote. I don't much care which is hotter but I want to know which one has the more popular flavor, and I'll be looking hard at how well the plants do and which produces more. So far, it's neck-n-neck, with all the plants looking good, growing well, and the biggest ones covered in buds and flowers. See how they're rocking in September for an actual verdict, though....