There is a slight difference in the shape of the foliage. Arborvitae in general are more cold tolerant depending on the variety you chose. Both can grow in the Capital District just fine but, if you are in the Adirondacks, arborvitae would be a better choice. Deer can be a problem for either although Green Giant Arborvitae are considered “deer resistant” which means that deer might eat them if there is nothing else available.