Is DS 160 Confirmation Number Same As Application Number?
For your purpose, yes, those are the same and will point to each other. No, you do NOT need to resubmit a new DS-160 after you pay the fees and/or schedule the interview appointment.
From the Retrieve a DS-160 Application page, click the Forgot your Application ID? link. The Retrieve Application ID pop-up appears. Enter the answers to your security questions.
Retrieve an Application ID
How do I know my DS-160 confirmation number?
Furthermore, you can find your DS-160 confirmation number (or Application ID) right underneath the barcode. You will need this number throughout the further application process. It is absolutely necessary to print this confirmation page. You must bring it to your consular interview, among other documents.
DS-160 Form - Online Nonimmigrant Visa Application
What is a DS-160 barcode?
The barcode number on the Form DS-160 confirmation page is required in order to book your interview. The Form DS-160 must be submitted online. The U.S. Embassy will not accept handwritten or typed applications and you will not be permitted to attend your interview without a Form DS-160 confirmation page.
Apply for a US Visa | DS-160 Application Form Information
The Application ID Number is displayed on the top right-hand corner of the page after you begin filling out the online form. You may complete your Form DS-160 over time, as long as you saved your progress. You have 30 days to return to a partially completed application and complete the DS-160.
How to Complete the Online Visa Application Form (DS-160)