Does difference in URL's have an effect on Search Engines

Difference between thw URL's

[abacuss]

Can anyone help me?

Is there any implication for the the difference between the two url's

[domain.com...]

[blog.mattcutts.com...]

Any suggestion will be welcomed

[ska_demon]

If you are asking about subdomains then I don't think there are any major implications. Just make sure that you don't have any duplicate content issues and don't stuff your subdomains with keywords.

ie http:/*www.keyword-keyword-keyword-keyword.example.com

Ska