Yes, A/B testing is the best means to answer this question. What works for other people says little or nothing about whether it will work for this person, thoug

Yes, A/B testing is the best means to answer this question. What works for other people says little or nothing about whether it will work for this person, though some comments might contain nuggets of insight as to why it works for some people and not others and that might be useful. But, ultimately, trying it is the way you find out.