Object 1:
    A : "1"
    B : "2"
    Old : "{5:4,6:3}"
    New : "{5:6,6:4}"

Object 2:
    A : "4"
    B : "3"
    Old : "{7:4,6:3}"
    New : "{7:3,6:4}"

End Result:
A,B,5_old,5_new,6_old,6_new,7_old,7_new
1,2,4,6,3,4,,
4,3,,,3,4,4,3