So I recently did a project for a client where I mixed all three of the different kinds of good quality stones Dreamtime creations offers; Swarovski, Alora and Preciosa. When I first asked the supplier their thoughts on how the other two stack up against each other she said: "In my opinion, the Alora stones will be more brilliant and "sparkle" more. Alora are comparable to Swarovski 2058 stones. Preciosa are still crystal, they are just a more economical version of the Swarovski and Alora."
For reference here is a pic of the various sizes and cost comparisons I sent to the client
(note I have a wholesale account so pricing may be different):
View attachment 4714091
And here is how the project came out (no sparkle filter or any editing btw, just the camera light for the video):
Here is the link to DC's flatback rhinestone options:
https://www.dreamtimecreations.com/category/1971/flatback-rhinestones/
EDITED TO ADD: LOL my reply is number 666 in the thread lol!