The word use is kind of ambiguous, but to get an idea look up each of their electronegativities:
They both have zero electronegativity so they both are pretty useless in chemical reactions.
neon diffuses 1.4 times as fast as argon.
The chemical symbols of neon and argon are Ne and Ar.
noble gases
Both neon and argon are stable because they have completely filled orbitals.
neon
Neon and argon are two distinct elements.
neon diffuses 1.4 times as fast as argon.
The chemical symbols of neon and argon are Ne and Ar.
noble gases
Argon.
Diffusion
Both neon and argon are stable because they have completely filled orbitals.
neon
Pretty much just neon signs. Its practical uses as an inert gas have been made obsolete by argon which is much cheaper.
Argon
helium, neon, argon, krypton, xenon and radon
Neon is smaller.