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"nice widgets" as the anchor would have more weight to the query "nice widgets" than "very nice widgets" as the query and "very nice widgets" would have more weight to the query "very nice widgets" than "nice widgets". (remembering that returned results "therefore weight" is based on the query) the less of a match the anchor is to the query the less weight it carries.
A good example of the opposite is >>> science fair projects <<< was typed in at google.
4 pages equal in all other respects but each had a different "inbound" anchor.
1. science fair
2. science fair project
3. science fair projects
4. science-fair-projects.tnt (or any other extension)
Weight would likely be scored (most to least) 3, 4, 2, 1 (note it could be also 1, then 2 since google doesn't parse partials - 2 could have the least weight)
In this case the less "exact" words diluted weight.
<added> this can become quite apparent when noting a page at #1 for a specific phrase -- you would think that the same page would be #1 if quotes were added.
But not normally the case.</added>
I want to effective link these sites together so that each link produces the maximum potential for the other site.
I'm targeting black widgets and widget.
In general (remembering if you already have a link to your mainpages you really don't need another one applies)
Copyright statement of widgetery.com
Widgetery.com is a commercial widget [widgetery.com] resource and brand web site of Widgetery incorporated.Widgetery incorporated owns and operates Black-Widgets [black-widgets.us].us as an e-commerce portal site for purchasing widgets.
Copyright © 2002 Widgetery incorporated. All rights reserved.
Rather than using widgetery.com and Black-Widgets.us as full anchors.
A similar style can be made for for Black-Widgets.us.
Most search engine ignore or do not weigh/apply the hyphen in a domain & one reason why keyword domains are very effective.
However, the extention is another matter, dot.anything can add or dilute weight depending on if the query uses it, so if link anchors text use .us (or anything else) the anchor can be diluted from its maximum potential weight for the keyphrase "black widgets".
In addition, it also may be helpful (for appearance) if the .us had format properties similar to a link (e.g. - underlined and blue) but not part of the anchor text itself.
As far as titles - plain understanding is best so the use of the extension should be avoided unless branding supports its use.