I believed there should be a different between Cost estimate and Quantity bill. But a learnered client told me capital no. That's both are d same. Pls discuss?

Is the client a quantity surveyor? If they are the same, why the difference in terms of description? Are u a QS? BOQ is more detailed, it takes longer time to prepare, it has a higher degree of cost certainty...

Thanks snakebeat for d response. The client is an accountant(chartered) claimed studied in abroad. Am a structural engineer working with team of seasoned architects and builders. The cost sent to d client was even prepared by Qs but commented that is not in detailed because its not bill of quantity . that's what really brought out d argument. We in the construction knew its different to each other but d man as a learnered and old man disagree totally. We want him to see pple response over the trends. Thank u.