eerily similar

Compare the openings of these two pieces of music:

Both start with an E-flat descending guitar scale, 3-3-2 rhythm, lots of sol-mi-sol in the vocal.

I don't think there's any real relation here; eventually the two songs go very different places.

However, take a listen to each song in its entirety. One of these artists has a heavy metal reputation and supposedly once at a bat onstage; the other is a comedy artist whose material is considered kid-friendly and who is widely known for being kind and generous in person. One of the songs is much, much darker than the other. I was a little surprised by which.