Hi Guys

I am just wondering whether or not for SEO purposes it is better to have a small number of categories for your blog posts to fit into as opposed to numerous ones.  The reason I ask is that I have one site which is fairly new to the search engines - 8 months old which has 7 general categories within the blog for instance "rail contractors", "railway construction" "airport construction" etc   I have another site which is 10 years old which has built up 25 different types of categories for instance brand design, brand development, brand management (i guess you could put all these under 1 category "branding"?  We've been writing lots of press for both sites... yet the younger site is getting more coverage on Google page 1.  Would this be because the blogs / press are more concentrated under a specific category as opposed to being spread thinly throughout the site? Any help would be appreciated.

Debs