большая разница

• БОЛЬШАЯ РАЗНИЦА{{}}

[NP; sing only; subj-compl with быть (subj: это, infin, or subord clause or clauses); fixed WO]

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⇒ some circumstance (action etc) is entirely different from another previously mentioned circumstance (action etc):

- это большая разница{{}}≈ there's (it makes) a big difference.

     ♦ Ты согласился перейти в другой отдел сам, а меня заставили. Это большая разница. You agreed to transfer to another department, but I was forced to transfer-there's a big difference.