So a couple thoughts on salt mixes.
1. Your target parameters
2. Consider you're dosing regime
3. Consider you're water change regime
For many years, I used IO Reef Salt as my main salt due to its elevated parameters. I did a bi-weekly small 5-10% water change to keep my tank at more normal sea water parameters. Basically, the elevated IO Reef salt parameters were replenishing my tank...no dosing.
For my new build, I'm going with the Triton method and an incremental AWC (already implemented now on old tank). In this case, I needed to switch to a salt that mimics natural sea parameters so that the dosing maintains the the proper parameters. I went with Brightwell Neomarine Salt which has a 7.5dK and will allow a target 8dKH or slightly higher dKH and other parameters be maintained by the Triton method.
So when picking a salt mix, you need to make sure it works with your target parameters and tank maintenance plan.