According to QuickLOAD, burning rate is the same for both varieties of H4831 but the short-cut kernels allow a bit more weight of powder in the same space as "normal" H4831. This could be useful if you're planning on using it for your .30/06 long-range loads - as you might have difficulty stuffing enough regular H4831 in the case for sufficient velocity to be supersonic at 1000 yards - especially if you're sticking with that heavy LC brass you mentioned.

Cartridge          : .30-06 Spring.
Bullet             : .308, 178, Hornady A-MAX 30712
Cartridge O.A.L. L6: 3.340 inch or 84.84 mm
Barrel Length      : 24.0 inch or 609.6 mm

Predicted Data for Indicated Charges of the Following Powders.
Matching Maximum Pressure: 58000 psi, or 399 MPa or a maximum loading ratio or filling of 105 %
USE ONLY FOR COMPARISON !

Powder type          Filling/Loading Ratio  Charge    Charge   Vel. Prop.Burnt P max  P muzz  B_Time
                                      %     Grains    Gramm   fps     %       psi     psi    ms
---------------------------------  -----------------------------------------------------------------
IMR 4350                 105.0     56.7     3.67    2754    95.5    56119   11172   1.189  ! Near Maximum !
Hodgdon H4831 SC   105.0     59.8     3.88    2683    92.0    51473   11159   1.227  ! Near Maximum !
Hodgdon H4831        105.0     57.5     3.73    2567    89.7    44996   10581   1.305