I would say Vince said it all in a nutshell!
Pecan will give you everything Apple gives only stronger and it will also last much longer, even two or three times longer. Don't forget Oak, it is also a premier smoking wood!
My rule of thumb for rating smoking woods is the Nut woods on top, then the Fruit woods followed by the Bean woods....Nut woods include: Hickory, Pecan, Oak, Pistachio etc.... Fruit woods: Apple, Cherry, Plum, Citrus etc.... and Bean woods (Legume): Mesquite, Iron wood, Ebony etc.... the last group is best used as the coal base, although a few have mastered the use of Mesquite in their smokers. Thomas