Hi Joe
Looks like the 7538 is a "Soft Start" other than that they look the same,with in a dollar or two in price.
http://www.amazon.com/Porter-Cable-...4-7750249?ie=UTF8&s=hi&qid=1175094472&sr=1-34
http://www.amazon.com/Porter-Cable-...94-7750249?ie=UTF8&s=hi&qid=1176390313&sr=1-1
Bj
Looks like the 7538 is a "Soft Start" other than that they look the same,with in a dollar or two in price.
http://www.amazon.com/Porter-Cable-...4-7750249?ie=UTF8&s=hi&qid=1175094472&sr=1-34
http://www.amazon.com/Porter-Cable-...94-7750249?ie=UTF8&s=hi&qid=1176390313&sr=1-1
Bj