Google's Broadmatch versus Exactmatch in SERP's

How does Google determin the relative importance?

[Whitey]

How does Google behaviour determin what will be shown under exact match and broad match searches

Our site consistantly produces results towards the top of the SERP's for "exact match searches" which match the meta title.

Conversely, it consistantly shows "broad match searches" at the bottom of the SERP's for the same given phrase.

Interestingly on Yahoo we rank highly on both.

[The site has had previous dupe content issues with Google [which i thought was fixed ]].

Since this is "consistant", i wonder what it's revealing? Any ideas?

[seochristine]

Actually a belief that you get a perfect competitor analysis by looking for exact match searches is not true to some extent.
Let us assume you have numerous occurances of the keyphrase "kw1 kw2 kw3" in your web page content in simple text format, but other on page factors such as keyphrase in anchor, heading tags etc.. for getting your page in top of the SERP's have been missed out. So, in my opinion, you may well get a top rank for the exact match search. In order to get a proper competitor analysis u may do a search with allintitle and allinanchor or simple intitle or inanchor would also do. The sites doing SEO would obviously include their keywords in their title and anchor.
Your targeted keyphrase in your backward links are also beneficial to a great extent.