1k USD vs 1.1k vs 1.4k vs 1.43k - says the comparison table near the end. Since they are in the same ballpark I want to know the numbers for benchmarks as well.

1k USD vs 1.1k vs 1.4k vs 1.43k - says the comparison table near the end. Since they are in the same ballpark I want to know the numbers for benchmarks as well. If they are in the same ballpark then this is worth buying, otherwise I don't value my privacy just for the sake of it and lose instead 100% performance. So, any links to benchmarks as well?