With the sticker you can simplify it and go all one solid colour vinyl, as long as the design allows it.
A layered sticker is more expensive to produce so keeping the sticker colours side by side is the best bet.
So the final logo must work on all these applications (vertical, horizontal also cheap to produce as a car sticker/decal).
with the grey tassie maps you can use a brushed steel vinyl if you chasing that look, but specialty vinyls an't cheap!