There are many variables between 2 different models of bicycle besides the slope of the top tube. I don't really know if a valid comparison could be made between a compact and a standard frame unless everything else from tires to tubeset was made identical. As for the appearance of compact frames, a lot depends on the proportions. Some compacts are too compact for my taste.
My Giant OCR 1 seems about right to me as far as slope goes. (But then it would, wouldn't it?...LOL).