4 minutes ago, Savant82 said:
No they aren't.
Yes they are, the 3366 is just Logitech's exclusive name, where Logitech might or might have not made some changes. The 3360 is just the public name for the Logitech exclusive 3366. The only difference which i'm not 100% sure is the dpi steps of 50 and 100 respectively.