IGF 2 is a GH and Test Booster. Drive is a test booster geared towards endurance. Both boost test, but in different ways. Also, IGF 2 is great for the 30+ age group, but works well with the younger ages 21 and up also. And it is perfectly fine to stack together.
as far as which is better, you cant really judge that since even though both boost test, they dont provide the same exact results. they are two totally different kinds of products.