Can’t find the link now, but some guy once made the point that the vast majority of human beings, historically and presently, are not religion nerds. In the context of the United States today, an enthusiastic Protestant missionary, a liberal Catholic trying to reconcile her faith with her progressive political views, a lapsed Christian who has gotten really into neopaganism, and even the hardcore atheist are all equally religion nerds in the sense that they have thought deeply about the topic, developing strong opinions about various moral, ethical, and doctrinal issues. By contrast, most human beings live in a state of vague shamanism - they identify with whatever religion they grew up with, and have some vague belief in a higher power and such, but really have not thought about the topic in a systematic way, wrestling with the content of their holy texts.
As such, I don’t think it’s helpful to appeal to a layman’s understanding of the faith when discussing whether and Christianity and paganism are different in practice, because by that logic, most religions that exist today aren’t that different in practice. For the vast majority of their adherents, it all boils down to being nice to people and platitudes like that, no?