raspbian img file discrepancy after write to sd card

gistfile1.txt

007f4570  74 00 78 00 74 00 00 00  ff ff 00 00 ff ff ff ff  |t.x.t...........|
007f4580  49 53 53 55 45 20 20 20  54 58 54 20 00 29 1a 69  |ISSUE   TXT .).i|
007f4590  2b 52 2b 52 01 00 1a 69  2b 52 81 69 91 00 00 00  |+R+R...i+R.i....|
007f45a0  e5 54 41 52 54 5f 7e 31  4e 48 4e 20 00 2e 15 69  |.TART_~1NHN ...i|   ***
007f45b0  2b 52 2b 52 00 00 15 69  2b 52 00 00 00 00 00 00  |+R+R...i+R......|
007f45c0  e5 43 4d 32 37 31 7e 31  4d 4e 5a 20 00 c2 14 69  |.CM271~1MNZ ...i|
007f45d0  2b 52 2b 52 00 00 14 69  2b 52 00 00 00 00 00 00  |+R+R...i+R......|
007f45e0  42 2d 00 72 00 65 00 76  00 31 00 0f 00 59 2e 00  |B-.r.e.v.1...Y..|
007f45f0  64 00 74 00 62 00 00 00  ff ff 00 00 ff ff ff ff  |d.t.b...........|

vs

007f4570  74 00 78 00 74 00 00 00  ff ff 00 00 ff ff ff ff  |t.x.t...........|
007f4580  49 53 53 55 45 20 20 20  54 58 54 20 00 29 1a 69  |ISSUE   TXT .).i|
007f4590  2b 52 2b 52 01 00 1a 69  2b 52 81 69 91 00 00 00  |+R+R...i+R.i....|
007f45a0  41 73 00 73 00 68 00 00  00 ff ff 0f 00 be ff ff  |As.s.h..........|   ***
007f45b0  ff ff ff ff ff ff ff ff  ff ff 00 00 ff ff ff ff  |................|
007f45c0  53 53 48 20 20 20 20 20  20 20 20 20 00 62 90 00  |SSH         .b..|
007f45d0  6c 52 6c 52 00 00 90 00  6c 52 00 00 00 00 00 00  |lRlR....lR......|
007f45e0  42 2d 00 72 00 65 00 76  00 31 00 0f 00 59 2e 00  |B-.r.e.v.1...Y..|
007f45f0  64 00 74 00 62 00 00 00  ff ff 00 00 ff ff ff ff  |d.t.b...........|