tig mig welding wire and you have no differenceMIG (Metai inert gas) is an inert gas shielded arcStainless Steel Welding Rod  welding, the wire should be used in the same composition and the substrate.
TIG (Tangstent inert gas) is tungsten inert welding. Tungsten is used as an electrode. TIG welding is generally used to eliminate the existing welding stress and improve the mechanical properties of the heat affected zone.