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1.A is completely / totally / entirely different from B。 2.A and B are different in some/every way / respect / aspect。 3.A and B differ in… 4.A differs from B in… 5.The difference between A and B is/lies in/exists in… 6.Compared with/In contrast to/Unlike A, B… 7.A…， on the other hand,/in contrast,/while/whereas B… 8.While it is generally believed that A …， I believe B… 9.Despite their similarities, A and B are also different。 10.Both A and B … However, A…; on the other hand, B… 11.The most striking difference is that A…， while B… | 
