Haha if I'm honest I'm guessing chillis are basically the same but generally smaller with extra punch to make up for it. I used to grow a lot of chillis a few years back and was really into it, but forgot all knowledge on chillis themselves had like 35 plants at one point. From orange+choc habaneros, Bhuts, jalepeños, birdseyes, fish chillies and many many more. At the moment just unknown plants from local plant store but I'd be interested to see a proper answer to your question
I was wondering about calcium deficiency as I've read that using Biobizz you could be lacking it, but I also read that top max should have enough to help with it. But I only introduced that recently to the feed. I was wondering also could it be sun magnification through water on the leaves burning holes? Just a theory...?