Given the same amount of time to grow, and same food sources, the subspecies of whitetails found in New York (Odocoileus Virginianus Borealis) will be larger in body size. Antler score would probably be very similar.

Most of Iowa is typically going to produce animals of the subspecies known as Odocoileus Virginianus Texanus, and/or Odocoileus Virginianus Macrourus. The two found in most of Iowa (not all parts) isthe same subspecies that is common to the southcentral region of the country including Texas.

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Edit: Some believe there are up to 17 different subspecies of whitetail in North America. Genetically, the deer from Florida are a different critter. Look up Odocoileus Virginianus Seminolus, Odocoileus Virginianus Osceola, and Odocoileus Virginianus Clovium.