It takes a lot to set up a scope properly--lapping the rings, leveling the crosshairs, adjusting eye relief, etc. X2 if you're swapping (although rings may already be lapped). Different rifles, so you may have minor blems where the rings were previously located. Scopes could be damaged while removing, installing, etc. Plus, a fair amount of ammo for sighting in, etc.
If those were my rifles and everything was working okay as is, I would leave it alone. Take the time and money you would have spent and shoot more.
just my .02