War for Cybertron vs. Prime

As of recently, it has come to my attention that there are those who are still unconvinced of the confirmed connection between the War for Cybertron video games and Prime cartoon. In spite of all the official statements that the two exist within the same collective continuity, several have claimed there to be too many inconsistencies between the two for them to be the same reality.
Well, what exactly are these contradictions that are not and cannot be reconciled between the two? Having experienced both thoroughly enough, I see no conflicts that prevent the two from existing together in the same timeline. One takes place in the ancient past, and the other takes place in the present day. There exists enough time (millions and millions of years, to be precise) for any number of changes to have occurred between the two.
What exactly is it that's keeping everyone from seeing the bigger picture of these two being linked together in the same reality?
Well, what exactly are these contradictions that are not and cannot be reconciled between the two? Having experienced both thoroughly enough, I see no conflicts that prevent the two from existing together in the same timeline. One takes place in the ancient past, and the other takes place in the present day. There exists enough time (millions and millions of years, to be precise) for any number of changes to have occurred between the two.
What exactly is it that's keeping everyone from seeing the bigger picture of these two being linked together in the same reality?