Though both the Apple and Dell 20" displays use the same LG.Philips LCD LM201W01 panel, Apple and Dell seem to differ (at least in terms of marketing) on several specifications including response time, contrast ratio and brightness. Granted, Dell and Apple use different backlights that may account for the 50 nit difference. On the other hand, Apple hardware is traditionally listed with slightly conservative specifications. Part of our review process is to evaluate these specifications anyway - and since these are nearly identical displays, it will be very easy for us to verify which model has the more accurate listed specifications.