If you’re not a clay stan, or aspiring mixtress, you’re probably not missing out on much. That being said, if you know your hair well and notice subtle differences (or not so subtle in some cases) of products, having an expansive collection would be beneficial. My recommendation would be to experiment with them 1 or 2 at a time, instead of launching into ingredients PJism...
For myself, I have a collection of 8+ clays and I have a rotation of them. I use them for face, body, and hair. I use them for detoxification, cleansing, and moisturization. I use them internally (the food grade ones) and externally.
For instance, I can tell the difference between calcium Bentonite clay and sodium Bentonite clay. Most people don’t pay that much attention to their hair or ingredients though.
I believe the composition of iron oxidation in the clay is what tinges it pink. Some pink clay formulations are a mix of white clay and red clay though. Australian pink clay... is quite different from all the others I’ve experienced. It’s quite high in silica, which may have something to do with its effects. I would say a step above in terms of moisturization and detangling in comparison to the other top 5. It’s a little pricier and harder to find reliable sources though so maybe not worth the hassle. Some people will find a shoddy distributor and blame the product which may not be that reliable. I got mine from a wholesaler.
I’ve used rose powder and aloe vera powder in Bentonite and rhassoul clay. All I can say is that the effect is different.
If you’re satisfied with your results so far, maybe just wait until you run out of your current stash to try pink clay out? There’s a few different varieties though.
Sorry for the novel! Lo
ETA: I’ve not gotten around to it but I’ve been meaning to test the pH of my most beloved products & formulations. I recently saw a video on how that may be the key to your hair’s happiness with certain things over others regardless of similar ingredients. And here’s a decent site with some basic info about differences in clays:
https://www.nourishedlife.com.au/article/825809/difference-between-white-green-pink-clays.html