gnome system monitor shows different resource usage than top
There is a significant discrepancy between the memory usage reported by the System Monitor in Gnome and the command-line utility "top". Right now, for example, Gnome's System Monitor reports 343M of 500M user memory being used. top, on the other hand, reports 465M of 512M used. Gnome's System Monitor reports 435M of swap used while top reports 446M of swap used.
Does anyone know why there would be such a difference and which is more accurate?