Originally Posted by MidiMagic

I can think of several reasons:

- Different browser communications settings.

- Different methods for the way the browser assembles the page.

- Different handshaking orders.

- Different methods of resizing images to fit.

- Different methods of displaying (maybe one waits until the entire image is downloaded before displaying any of it)

- Different internet cache settings.

- Fragmented internet cache on one browser.

- If both are installed on the same computer, the second one might get a less optimum cache space. It's even worse if both programs are open.

- Different virus checker settings or methods.