To "Call" or "Not to Call" a batch file?

If from inside a bat file you called another batch file but still had a few remaining operations to complete, how can you make sure that the call to first bat file will after completion or error, will return to the file that called it in the first instance?

Example:

CD:\MyFolder\MyFiles
Mybatfile.bat

Copy afile toHere

or

CD:\MyFolder\MyFiles
CALL Mybatfile.bat

COPY afile toHere

What is the difference between using CALL or START or none of them at all? Would this have any impact on whether it would return for the results of the copy command or not?