A/B Test: One Word, Two Spellings: Which One Increased Opt-ins 25.87%?

We've seen A/B tests that show what a huge difference even two words on a page can make—but what about two letters? Milan Jara of Decorative Ceiling Tiles got some surprising answers to that question in this recent A/B test. Milan’s LeadBox™ asks visitors to opt in to receive the latest catalog. Or catalogue. Either spelling is valid, so Milan decided to let an A/B test decide which one he’d use in the call-to-action button. Which version do you think increased this LeadBox's opt-ins by 25.87%? Vote below to reveal the winning A/B-tested LeadBox and our analysis. [split_test id="5615"]