Beyond the name and packaging, the candy bar remains unchanged and includes the same combination of (Reese's) peanut butter, chocolate, caramel, peanuts, and pretzels.
Why the change? Apparently, "the Reese's name makes everything better" and they have the "science' to prove it. "Science" meaning they asked some fans to compare a regular Take5 bar with a Reese's Take5 bar and then to share their impressions. Branding being branding, the fans mostly thought the Reese's version was better and so, it's now the Reese's Take5 bar.
Photo via Hershey's.