What is the difference between 'working experience' and 'work experience'?

Should we use 'work experience' or 'working experience' as the subject of categories in resumes ?

In addition, is "work experience" (BrE) = "internship" (AmE) in English?

I google these two phrases.

Some people said:

"Internship" tends to be of rather longer duration than "work experience".

Is this correct?

Any help would be appreciated !

Thanks !