Of course, Zod was designed by Krypton to be the perfect soldier and their greatest warrior. And since Shannon cited General Grant's memoir's as an inspiration, maybe we should think of Krypton's foremost fighter as being a combination of spec ops commando with the officer's background like that of an early 19th century American military officer.
Grant, Stonewall Jackson, and other future commanding generals of the Civil War had commands or assignments that put them close to the front line during the preceding Mexican-American War. And the Civil War itself saw several officers go from front line command positions to still frontline general commissions. Maybe Zod has more in common with someone like Joshua Chamberlain, or for a darker comparison, Nathan Forrest.
Zod's clearly a commanding officer who has no issue getting his hands dirty and he even seems to have been bred for that purpose. So maybe his vocal inflection is similar to that of a grunt, albeit a highly educated grunt used to command.
And I really like the contrast in his armored looks. The one on Krypton looks refined, vibrant, and "alive," while his other armor has this kind of rough and ugly look. Makes The implication seem like Zod and his crew are still trapped in a stagnant past while Superman is taking off in a fresh direction with his suit's more vibrant coloring.