There is not difference in sugar produced from either cane or beet. The chemical makeup of sugar from a sugar beet and from sugar cane is identical. By the time sugar reaches the package or sugar bowl, it is 99.9+% sucrose. Cane sugar and beet sugar taste, smell and behave exactly the same.
Sugar cane, a giant grass that thrives in a warm, moist climate, stores sugar in its stalk. The sugar beet grows best in a temperatre climate and stores its sugar in its white root. Nature produces sugar from both sources in the same way all green plants produce sugar-as a means of converting the sun's energy into food reserves.