Still no official word from logitech, but looks like the 303 is an updated version of the 302-- same shell but comes with 3366 sensor (like in the g502), rgb lighting, and maybe a braided cable? Also some different mouse feet to address the 302 wobble.
Logitech Press Release
Edited by son! at 06:50 CST, 5 March 2015 - 26780 Hits