I agree that the Gnostic Gospels in over all content do not vary much from the New Testament. The one particular that I found to be different in it's messages was the role of women in the context of God. In the Gnostic texts their role appears to me much more defined and present, than what is written in the New Testament. I know this role is not lost entirely in the NT, I simply feel it does not bear as much emphasis as what is found in the other texts.
The Gospel of Thomas which is sometimes called the 'fifth' gospel, I agree again has a more intimate feel. I think it more closely resembles the gospels in the NT and therefore gives the reader a familiar feel.
Peace,
Fredi
