There is a resurgence of this idea about ten or 15 years ago in the circles of internet atheism, that christianity's copycap religion of an mystery religions and mystery cults. There are by some that i don't know of. And so it looks like christianity, which came later, borrowed from these things. But what you see is that these were evolving, changing, transforming belief systems. They start borrowing from the christian claims, not the other way around. So you do get the answer is yes and no.
“If Christ has not been raised, then our preaching is in vain and your faith is in vain,” writes the apostle Paul (1 Cor. 15:14), situating the resurrection as the central claim of Christianity—the foundation for the entire biblical worldview. But why is it so important? In this episode of White Horse Inn, Eric Landry, Justin Holcomb, Bob Hiller, and Doug Powell discuss Christ’s resurrection as a unique claim among world religions. They also work through “The Minimal Facts” put forward by Gary Habermas, equipping listeners with an agreed-upon baseline for proving the historicity of the resurrection and evaluating objections.