[xxs]

>just not by the 50% the test might show but it's still going to be 5% better.

Sort of, indeed. Yet, when you see any promotional/marketing material - you see all those phallic bar graphs, and how much bigger it is. Other than that - heavy cache utilization hides inferior memory subsystem (latency/throughput), the latter tends to be quite important in the real world. Overall benchmarks/tests that feature handful of MB as datasets, and run in 100s of ms - should not be used as representative... for most use cases.

That was my initial point - 'don't trust'.