If, by 'improved performance', you mean faster frame rate, no. The only added performance bonus is having double the battery life.
The added weight and girth makes the camera more stable in a photographers hands, which has a lot to do with why pro grade DSLRs have a vertical grip built in by the factory.
The added weight and girth makes the camera more stable in a photographers hands, which has a lot to do with why pro grade DSLRs have a vertical grip built in by the factory.
........ I shoot portraits the "wrong way" so the extra buttons don't do anything for me........