According to Mashable, the shape of the peanut butter-filled vessel also plays a significant role in the dessert experience. The thick ridges that surround the peanut butter cups are packed with dense chocolate but will make the experience of biting into a cup more chocolaty than peanut buttery, with the bulk of the peanut butter concentrated in the center. The egg, with its smooth edges, makes the peanut-butter to chocolate experience more balanced throughout, proving that its size and shape make the egg the ideal vehicle for delivering rich and creamy goodness.
Throw in the fact that Reese’s eggs are a seasonal item, and therefore can only be enjoyed for a limited amount of time, and you have the makings of a superior chocolate and peanut butter dessert. However, if you’re someone who prefers less peanut butter, then you might feel the opposite is true. But regardless of individual peanut butter preference, it seems we can all agree that, despite seeming quite similar, Reese’s eggs and Reese’s cups are certainly not interchangeable.