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…