gpart and differences in FreeBSD 10 and 11

[Christos Chatzaras]

The first disk created with gpart on FreeBSD 11 and the second with gpart on FreeBSD 10.

gpart show
=>        40  7814037088  ada0  GPT  (3.6T)
          40          88        - free -  (44K)
         128         128     1  freebsd-boot  (64K)
         256     8388608     2  freebsd-ufs  (4.0G)
     8388864   134217728     3  freebsd-swap  (64G)
   142606592    33554432     4  freebsd-ufs  (16G)
   176161024   134217728     5  freebsd-ufs  (64G)
   310378752    33554432     6  freebsd-ufs  (16G)
   343933184  7470103944     7  freebsd-ufs  (3.5T)

=>        34  7814037101  ada1  GPT  (3.6T)
          34          94        - free -  (47K)
         128         128     1  freebsd-boot  (64K)
         256     8388608     2  freebsd-ufs  (4.0G)
     8388864   134217728     3  freebsd-swap  (64G)
   142606592    33554432     4  freebsd-ufs  (16G)
   176161024   134217728     5  freebsd-ufs  (64G)
   310378752    33554432     6  freebsd-ufs  (16G)
   343933184  7470103944     7  freebsd-ufs  (3.5T)
  7814037128           7        - free -  (3.5K)

Any idea why it shows as first sector 40 in first case and 34 in second case?