11.   Comparing the rates is difficult at best because the surveys may not ask exactly the same questions or be conducted at the same time of year.

12.   Definitive data on how well privatization has worked in other cities are difficult to find and, because each city has different problems, comparing data also is difficult.

13.   I understand why Dan wanted to buy online, where it is easy to compare prices quickly.

14.   It is worth comparing the products if price is not the only issue.

15.   The report said comparing states is difficult because they use different monitoring techniques.

16.   The two portraits are side by side, and comparing them is easier.

17.   There are so many differences in the two situations that comparing the two is rotten apples and spoiled oranges.

18.   UConn officials said that comparing college stadiums is like comparing apples and oranges.

19.   But if comparing Malaysia to Vietman is also sacrilegious, let me limit the exercise to just one specific matter - water.