There is no indication of date of birth for the man who died from wounds while interned in Switzerland so it is a matter of adding up the clues.
He was 8351 Sjt James Driscoll , 2nd Battalion Royal Munster Fusiliers. His number indicates he joined up in 1905 or 1906. His overseas war service started on 13 August 1914 when he went to France with his battalion.
His burial while interned in Switzerland indicates he was one of the wounded/sick interned under agreements made between the Swiss Government and the French, British and German Governments under which a certain number of wounded/sick prisoners of war were interned in Switzerland. The Red Cross document recording his death from TB on 25 March 1918 has his date of birth as 4 Feb 1888. He was captured in 1914. His POW documents add nothing except that he was transferred to Switzerland, already sick, in 1916 from Limburg POW Camp.
The Register of Soldiers Effects is the only document that has any personal info, the name of his widow Susan. He was certainly serving in 1911 when the mrriage took place.
Really up to you to decide whether that man is yours. I would work on the relationship between Susan and the Cork end of it all.
MaxD