CALL command vs. START with /WAIT option

Question

How is the START command with a WAIT option

START /wait notepad.exe 
START /wait  notepad.exe 

...any different from using a CALL command?

Answer 1

There is a useful difference between call and start /wait when calling regsvr32.exe /s for example, also referenced by Gary in in his answer to how-do-i-get-the-application-exit-code-from-a-windows-command-line

call regsvr32.exe /s broken.dll
echo %errorlevel%

will always return 0 but

start /wait regsvr32.exe /s broken.dll
echo %errorlevel%

will return the error level from regsvr32.exe