i have bought both and used both side by side.
night shade is more of a blue tint and WAY more clear. rustolium tint is cloudy, is more of a true gray (less blue)
night shade is very difficult to spray on in a light coat. seems you must spray a nice wet coat in order for it to lay on flat and glossy.
rustolium can be sprayed in a more of a feather/light coat and can be layed on less dark.
right now i like the hue that rustolium provides. but night shade is definantly more CLEAR and less cloudy. rustolium goes on more even then night shade.
night shade , by far is a better product if your wanting to go DARK. but for lighter applications, IE: slight smoking, rustolium seems to be ok.. just less transparent
i do not recommend either product for headlight tinting. they dont go on even enough to achieve a good look on clear headlight lenses. and i recommend buying headlight tint and having the film installed..... or using a clear coat with a touch of black transparent pigment mixed in sprayed on with an air brush/spray gun
edit : my findings
i did a few tests on water bottles, fast food container lids, and foil...
in each picture, the night shade paint is the one that looks more blue... the rustolium is the one that looks more neutral gray.
nightshadeV
rustolium V
night shade on left, rustolium on right. (rustolium is far less transparent, and very cloudy)
night shade on left, rustolium on right. night shade lets far more reflective properties shine threw
notice you can see the clouds above and the blue from the sky... but you cant on the rustolium side.
rustolium doesnt allow as much to pass threw on reflective surfaces...
my findings. though night shade has a less even spray, it is far more superior in the quality of paint. it is far more transparent. rustolium sprays on way more even with its better nozzle but the paint is so cloudy it detracts from clear surfaces.