same difference
From Longman Dictionary of Contemporary Englishsame differencesame differencespokenSAME used to say that different actions, behaviour etc have the same result or effect ‘I could mail the letter or send a fax in the morning.’ ‘Same difference. It still won’t get there on time.’ → sameExamples from the Corpussame difference• The same differences are evident in pay disparity, which is greatest at doctoral universities and the least at four-year colleges.• The same difference of sense recurs in the following: 79.