That's like asking "What's the best model coach".
I prefer the Centramatic balancing disks because the balancing beads are in a separate disc sandwiched between the wheel and hub and not inside tires.
When you replace tires or if you get a tire repair, you don't need to worry abut the beads lost or the mess in the tire, and you can move the balancing disk to another coach if you sell/upgrade in the future. Plus the external disk is sealed so you don't need to wonder if the tire guy put in the correct amount of beads - and no worry of beads clogging the schrader valve or clumping (although not a big problem, but still...).
Downside to Centramics, they are a lot more expensive.
Whole Assembly Balance for Heavy-Duty from Centramatic