Pretty much different uses also. The recip saw (tiger saw, wrecking saw) is primarily rough cut. Hack off a pipe, cut out a nail embedded two bye, rip out a wall, etc. oscillating is more for finish work, eg fine cuts on sheetrock, wood etc....particularly in cases where you are cutting against a flat surface that won’t accommodate a big old blade poking through. Won’t much see A framing crew with an oscillating tool....or a fine finish carpenter making regular use of a wrecking saw. Ron