http://books.google.com/books?id=CT6M97kkZisC&lpg=PA56&dq=usage%20%22as%20compared%20to%22&pg=PA55#v=onepage&q=usage%20%22as%20compared%20to%22&f=false
page 55
The participial phrases compared to and compared with are often ....
page 56
In the sentences that follow .... , and independent clause is followed by either compared to or compared with plus a noun phrase:
特別是這部份..
Note that in the first sentence, ....
...
as compared to/with
