Yes, this is the same Ludwig. The mystery continues, as I have an immigration document for a visit to the US in 1923 that not only indicates the same wife, Emelia, but also that he is 39, which would make 1885/1884 plausible. Further, it indicates he is from Zhitomir.
However, I can't explain why his headstone would read 1882. This is why I am trying to find further information, particularly about his parents or marriage to Media, which appears to be before his parents1913 immigration.
I'll email you regarding the process, thanks.