Pitbull and staffordshire are not the same thing. While a lot of people mistakenly consider them the same breed they have two different bloodlines and are two separate recognized breeds. In fact a lot of people will consider any bull dog to be a pitbull. This is a big pet peeve for me personally. As far as breed restrictions in your area you will need to see if staffys are also restricted.
Some info on the differences below if you are curious:
The American pit bull terrier and the American Staffordshire terrier descended from the same bloodline. In the 1700s, dog breeders in England crossbred the old type of bulldog with old types of terriers, including the English smooth terrier, mainly for bull-baiting. The result of this crossbreeding were dogs referred to as bull-and-terriers and, later, Staffordshire bull terriers. They were brought to America in the late 1800s due to their fighting ability. In America, the breed was often known as the Yankee terrier, the American bull terrier and the pit bull terrier. Since Americans preferred larger dogs, they crossbred them with other breeds, including the black-and-tan terrier and the white English terrier. Due to the crossbreeding, they became two different bloodlines -- the breeds we know today as the American Staffordshire terrier and the American pit bull terrier.
American Pitbulls are generally larger than staffies. American pit bull terriers have strong, solid builds and large, broad heads. Their weight ranges between 30 to 60 pounds, and their height can be 17 to 19 inches. American Staffordshire terriers have muscular, stocky builds. They can grow to about 18 or 19 inches at the shoulder and weigh 57 to 67 pounds. Both breeds have short, close, shiny coats.
American pit bull terriers are hard-working farm dogs who enjoy spending time with their families, especially playing with children. They are loyal and energetic, and they provide great companionship. The American Staffordshire terrier is fearless, tenacious, stubborn, playful, docile and good with children. The most meaningful part of an American Staffordshire terrier's life is the caring and attention they receive from their owner. Both breeds are protective of their families and can become aggressive toward other dogs. Early socialization with other dogs and animals is beneficial, especially if you have other pets within your household.
There are a few differences between the two breeds. Pitbulls shed more than staffordshires. Pitbulls are easier to train than staffordshires. Staffordshires are more adaptable than pitbulls. Pitbulls require more exercise. Staffordshire have a life expectancy 12 -14 years on average and pit bulls have a life expectancy 8 - 15 years on average. Pitbulls are more prone to wandering than staffordshires. Staffordshire are more likely to bark than pitbulls. Pitbulls have a higher hunting drive. Pitbulls are more prone to obesity than staffordshires. Pitbulls also tend to be cheaper in the us than staffordshires.