Totally different process well. I was gonna suggest we merge. I. Just don't like the way they carry. Themselves. Try both and pick a side Twix.

Ten years later, in 2022, a new campaign that replaced the previous one finally put this rivalry to rest by explicitly clarifying that both bars are identical. The new tagline reflecting this states, "Left or Right, a good decision either way."

According to the packaging, one crucial difference is in the application of the caramel: It "flows" onto the right Twix and "cascades" onto the left Twix.

In the early 2000s, manufacturer Mars Inc ran a “Need a moment” advertising campaign for Twix. A voiceover on the television ad for the bar said: “When you need a moment, chew it over with Twix.”

Right Twix, they say, “features chewy caramel on crisp cookie, cloaked in velvety chocolate” whereas the left bar is “smooth caramel on crunchy cookie, enveloped in creamy chocolate.” In 2017, they even started selling 2-packs of Twix labeled as containing “Two Left” or “Two Right” Twixes.

Or, to put it another way, what is the difference between left and right Twix? According to Twix themselves, the right side is “smooth caramel flowed onto crispy cookie and bathed in chocolate” while the right Twix is “crunchy cookies cascaded with soft caramel and cloaked in milk chocolate.” So, there you go.

The "Left Twix Vs. Right Twix" Campaign is a decade long marketing campaign by M&M Mars first launched in 2012. The campaign's goal was to refresh the Twix brand and make it relevant to a whole new generation of candy lovers. The original ad spot told of 2 inventors Seamus and Earl who together created the candy bar.

Right Twix, they say, “features chewy caramel on crisp cookie, cloaked in velvety chocolate” whereas the left bar is “smooth caramel on crunchy cookie, enveloped in creamy chocolate.”