Applitools Eyes provides the ability to render differences between different hardware characteristics. Using strict match level, Eyes can deal with different monitors, graphic adapters, etc.
With that, sometimes when comparing retina and non-retina displays, some adjustments will be required. In order to fully compare between retina and non-retina displays, it is necessary to disable the retina mode. You can find the full explanation regarding the required adjustments in the following Apple support tutorial.