A wonderful story all round pauashell! And I also agree that they are the same couple.

When I saw the title of this post, I was prepared to say they were different people. There are regularly similar queries trying to confirm if people in photos are one and the same, and it is quite rare that they are identifiable as such.
What I don't understand is that the owner of the other photo doesn't see any similarities ...

I can understand if they cannot find a connection, but they're obviously the same couple and as others have said, the photo looks to be taken on exactly the same occassion.
In addition to the similarities already pointed out by others, there is the man's distinctive hat - on head in wedding party photo - on knee in photo of couple ...