Dell and Viewsonic monitors are virtual carbon copies, buttons in the same places, specs almost the same, except that Dell's monitors are all black and until recently Viewsonic didn't make many black monitors for their own use.
Back in '99 or '00 when you bought a Dell (anything but the lowest end), you bought a Viewsonic monitor, said it right on it. After a while, they started rebranding them; but they're still Viewsonic. On some models Viewsonic will slightly downgrade the performance, ie their version of the E773 is .25, Dells is .27; otherwise they're the same.
Even their part numbers are almost all the same
Dell Part# --> Viewsonic Part#
--------------------------------
E771 -----> E771
E773 -----> E773
E171 -----> E175
E151 -----> E155
The above are all Dell's lower-end CRT and LCD models.
Dell's higher end monitors are also rebranded... mostly from Sony.
