prepositions – How to Use ‘Part with/from/away’

Macmillan Dictionary gives a definition of "differ" together with good examples:

1. to be different from something else

   differ in: The two animals come from the same family but differ in body shape and breeding habits.

   differ from: English differs from Spanish in that it is not pronounced as it is written.

   differ widely/significantly/greatly (=be very different): Laws on pollution differ widely from one country to another.

   differ from something to something: The techniques used differ from company to company.

2. to disagree with someone about a subject

   differ on/over: Experts differ on the causes of the disease.

   opinions/views differ: Opinions differ as to the likely winner of the tournament.

   differ with: Baker also differed with members of Congress over this issue.

   beg to differ (=disagree): I beg to differ with you a bit there.

I've heard a radio program on this topic.

Made of is used when the material the subject consists of doesn't change during the process of making the subject. As in the example by Armen elsewhere on this page:

Chairs are made of wood.

Here, wood is still wood. It doesn't transform into something else.

On the other hand, made from is used when the material changed its nature. Again, another Armen example:

Paper is made from wood.

Now, wood disappeared — it was transformed into paper.

Some more examples:

• The house is made of bricks. [They are still bricks.]
• Wine is made from grapes. [Grapes turn into wine.]