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tonyPick writes:

Spotted at Extreme Tech is a report on the variation between processor speeds on Intel Core-M devices between OEMs (Original Equipment Manufacturers):

...users have generally been able to expect that a CPU in a Dell laptop will perform identically to that same CPU in an HP laptop. These assumptions aren’t trivial — they’re actually critical to reviewing hardware and to buying it.

The Core M offered OEMs more flexibility in building laptops than ever before, including the ability to detect the skin temperature of the SoC (System on Chip) and adjust performance accordingly. But those tradeoffs have created distinctly different performance profiles for devices that should be nearly identical to one another

The article references the detailed analysis done by Anandtech. Originally spotted at Hackernews