Opinions on "Spin-off" Snacks?

About 30 years ago, I saw my first spin-off snack: it was the cheap freezer pops that came in plastic pouches, but they were branded "Jolly Rancher.". They were amazing!

Today I bought these. I love Starburst, but I am not a jellybean person. They taste kind of like Starburst, but not enough to make me overcome my dislike for jelly beans.

So what do you think? Nerds Ropes? Reese's Fast Break? Should these candies ride upon the coattails of a successful brand? Or should they live or die on their own merit?