wait a bit for the G900 chaos spectrum ma
The Logitech G502 proteus spectrum's rubber grip are only on the lower back portion/sides and they are hard rubber.
hell i am only mentioning they being rubber as that's what advertised but it feels like hard plastic to me lol.

they don't become sticky and they don't attract dust, winner in my book 
the only problem is the texture, it tend to get "stained" a bit having dirt from my hand clinging on to it.

=edit=
oh ya, i previously used Razer Deathadder before, rubberized coating.
eventually the rubber surface flake and peel off and it revealed cheap plastic mouse. went back to Logitech after that rofl.

you're welcome bro.

i think because they've been around for so long and their portfolio of products not to mention mice have been around for very long.

but ya, i went with razer once, never again, in the end stuck back with logitech.

Oh, why? Am using SS D3 edition.