difference between CV and resume:
1: Different length.
Your resume should be shorter than your CV. Compare just your CV with your resume. Don't compare your documents with other people's documents. For example, your resume may be longer than somebody else's CV. If this is the case then it's not an issue.
As a general rule, a CV is expected to have a length of 2 or more pages. A resume should be less than 2 pages. A resume can be even shorter than 1 full page.