Scott's vs GPR and Precision Racing steering stabilizers: how they differ
Short answer
Both make steering stabilizers, and they differ in adjustment, mounting, fitment and price. Check that a mount exists for your model first, then compare the specs on each brand's own page.
What Scott's says it does differently
Scott's says its stabilizers have three adjustable circuits, including a separate high speed circuit, and that you can adjust them while riding. Those are Scott's statements. Compare them with the specs on the other brand's own page for your bike.
How to choose
Fit comes first: a stabilizer is only useful if there is a mount for your model. After that, compare the adjustment range, how easy it is to service and the total price with shipping. Read the spec sheet for each brand rather than the headline claims.
Questions
Is Scott's better than GPR?
That depends on your bike and how you ride. Compare adjustment, the mount options for your model and the total price, using each brand's own specs.