Not another update thread

Why would Goggle and Yahoo/Google have a wide disparity

[kevinpate]

When I plug in kw1 kw2 kw3 at Google, page 1 says
1-10 of about 286,000

When I plug in kw1 kw2 kw3 at Yahoo/Google, page 1 says
1-20 of 256,000

Is that a somewhat normal spread between the two?
Does Yahoo/Google a Diet Google or Google Lite?

Sorry to be dense, I don't recall ever noticing this
before. Of course, only a goldfish has a worse memory than me, and most goldfish would probably respond with "in your dreams" if they could read the screen over your shoulder.

[marcs]

Speaking of memory... I seem to recall a similar post (Google only) and the difference in those numbers was accorded to the searches being executed on different machines/datacenters, which could hold slightly different data.

If that does not apply here, I'm sure someone will correct me shortly :)

[pmac]

I'm pretty sure it is because Y! doesn't cluster the results, so it strips out a bunch of pages that Google returns.

[FillDeCube]

Google shows sub result of the same domain.
Y! doesn't shows sub result from same domain.

For example, search google from google.com 's first two result is

1) Google.com
2) Google Groups
3) Google.de

However Yahoo result is

1) Google.com
2) Google.de

Google Groups which is sub result of domain google.com disappeared.

Hence Yahoo shows less results..