@ECHO OFF
IF "%EA:VA=%_%EB:VB=%"=="_" (
  ECHO EA == VA AND EB == VB
)

IF "%EA:VA=%_%EB:VB=%"=="%EA%_" (
  ECHO EA != VA AND EB == VB
)

IF "%EA:VA=%_%EB:VB=%"=="_%EB%" (
  ECHO EA == VA AND EB != VB
)

IF "%EA:VA=%_%EB:VB=%"=="%EA%_%EB%" (
  ECHO EA != VA AND EB != VB
)

IF NOT "%EA:VA=%_%EB:VB=%"=="%EA%_%EB%" (
  ECHO EA == VA OR EB == VB
)

IF NOT "%EA:VA=%_%EB:VB=%"=="_%EB%" (
  ECHO EA != VA OR EB == VB
)

IF NOT "%EA:VA=%_%EB:VB=%"=="%EA%_" (
  ECHO EA == VA OR EB != VB
)

IF NOT "%EA:VA=%_%EB:VB=%"=="_" (
  ECHO EA != VA OR EB != VB
)