Clients will have different demands depending on the product they are looking for and standards they expect, their standards change depending on how established the company is, how big the product is and what kind of work that has been done for them in the past.
Here are two briefs found online:
Brief 1:http://mekel.net/folio/buildersreg/content/res_int_clientbrief.html
Brief 2:http://pitchpen.com/faq/10049/10052/13011
These are both project briefs for construction. The differences between the two are as follows:
The layout for each of these briefs is completely different. Brief 1 uses a much simpler approach, in an order of mostly tick boxes and neat lists; it shows everything to expect from the project in a nice order. The layout is easy to read and works more like a 'tick list' of notes on what the project will need and who/what they are working with. It is much more like a layout of how they are going to complete the task, brief 2 is more like what they are going to complete the task.
The second brief is more like a wall of text with headers that are hard to distinguish from the rest of the text. Brief 2 does seem to have a lot more in-depth detail about the final result of the project and what they plan to do after the project is completed. The main difference between the two is how they lay out their information. Brief 1 is based around lists, diagrams and tick boxes; brief 2 is mostly about showing all the information in sub-headings. The rewards vary, this depends on how big the project is and what client the producer is working for.