We often use QMT when a mild acid wash is desired.
We dont use any of the others on stone.
Alkleen is handy on resilient flooring for some applications. I have several ranges of products available to me so we pick which we feel is the most cost effective/highest performing for each individual application.
One of the perks of having over 500 products on the shelf.
We also buy in products specifically for our own use also.