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> A/B testing is useful in the situation where you want a cleaner statistically significant result which I believe is actually a false argument.

Why do you say so? Can you elaborate?

Both methods can supply statistically significant results, there is no reason that A/B testing is fundamentally superior in getting a statistically significant result, although arguably A/B testing is more straight forward.

True, both methods can provide statistical significance. My only point is that in general A/B testing may require less number of visitors as compared to A/B for same amount of confidence.

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