The general answer is "neither", but it depends entirely on what your target audience is. If you know that your target audience will be using a particular device, it is fine to mix for that device specifically, but for general release, this is why color spaces and standards exist.
If you adjust your color on a well calibrated display in a standard color space, then it will look consistent relative to what a user is used to seeing on their device. It won't be perfect on any device that doesn't accurately reproduce the color space, but ideally each device will be at least somewhat close, even if it varies in one direction or another.
Designing for this conceptual "center point" keeps it looking ok on any consumer device and consistent with other things using the same standard color space. It also means that whenever someone views it on something that accurately implements the color space, they'll see exactly what you were going for.