I could see keeping one if you had a “heavy wear” use such as leaving in your truck, loaning to a kid, etc. But short of that, what use would you have for keeping BOTH vortex scopes if replacing with a swaro? Will he actually use them if he’s got a swaro to bring? Get rid of at least one, if not both.
Maybe I misunderstood the question. Is he unhappy with them? Both work fine for seeing bullet holes in paper at 400 yards. But probably not counting annular rings.