My neighbor has Primera Stone (sapphire treasure I think) and I ended up with Prism Matrix Indigo Blue. Personally, I liked the look of the glass beads in Prism Matrix and they also look more high end. (imo).
The one reason why I gave Primera Stone serious consideration was because of the "refinishing" possibility where you can polish the Primera finish and get it all smooth again - assuming this will be in 15 years when original plaster degrades. But, I was not sure if I will be here in this house in 15 years. More importantly, I figured I will want a 'changed' look 15 years down the line...so the repolishing aspect was not much benefit for me. YMMV.
If you feel like driving to Katy,TX you are welcome to see my pool and possibly also neighbors pool.
Hope this helps.