comparison signal words?

Question

I get confused about what to put after the comparison signal words *compared to* and *unlike*. To be exact, what kind of information should I put after this introduction. For example, should I say: > **[1a]** Unlike A, B is better or > **[1b]** Unlike A, A is worse. > **[2a]** Compared to A, B is better. or > **[2b]** Compared to A, A is worse. To be honest, 1a and 2a sound right to me, but not 1b and 2b.

Answer 1

Yes, 1a and 2a are correct and 1b and 2b are too confusing. When use comparative signal words, do not use the same noun twice in a row.