What is the difference between the pro diver 9403 2 and the 8928OB? Besides color?

Hello,The biggest difference between these watches (other than color of course) is the bezel. 9403 has a wave design along the bezel, and features bigger numbers (20,30,40,50) as well as pin dots along each minute from 3-12. 8928ob has a much smaller wave design which results in more frequent indentations. It features smaller numbers and does not have the pindots from 3-12. Hopefully that helps!-AAA Sundries Inc

Is it true the watch weighs 14.4ounce? That means 408 grams which is nearly half a kilogram

Just checked with a postal scale. It weighs 5.6. Oz, or 158 grams.

I think this picture of 9403 is wrong. Shouldn't the lower half be red?

The picture shown has the bottom half of the dial red. That is correct, the dial can be rotated 360°. Fantastic watch, very sharp and extremely durable.