\"Pixel Resampling\" is a specific type of \"Scaling\". \"Scaling\" simply means it is resized. PCAnywhere does \"scaling\"... but PCAnywhere doesn\'t do it well. PCAnywhere simply \"skips\" the extra pixels. \"Pixel Resampling\" takes, say, 4 pixels and averages out the color to produce 1 pixel with the average of those 4 (or more?) pixels. This produces a \"cropped\" image with much more detail and is easier to read.
In VNC, if I understand correctly, \"Pixel Resampling\" happens on the server. Some versions of VNC Server support this and some don\'t. UltraVNC does.
Hope that helps.