You said:
An interesting thing about what we have now in Christianity though is that it basically spawned as-is in the first century
The article says:
Little is fully known of Christianity in its first 150 years; sources are few.
So you’re making a huge, sweeping statement that Christianity as we know it today is based on something…we don’t know much about? There are 6 major Christian denominations, not to mention hundreds of smaller ones. Which one is the “as-is” one? The one that is exactly “as-is” from CE 100?
Nonetheless they are different. And you skipped past the whole “little is known” part, not to mention all the parts that got tossed out along the way.