Sub-domain or sub-folder for a blog?

[underscorelive]

Traditional thinking suggests sub-domains are treated as separate sites and so don't pass on link juice, but I've heard mixed opinions.

I'm very much a believer in sub-folders but I'm interested to hear some other opinions.

Thoughts?

[TomRayner]

Yeah, that's the general consensus around blogs, subfolder >subdomain.  Reinforced in this Moz guide.

However, I recall someone dispelling this myth with backup from Google or Matt Cutts that they are treated no differently from each other. There's also this post that concludes that there isn't a difference. Aaron Wall, well respected in the industry, thinks subdomains are arbitrary and aren't treated as a separate case.

My preference is to remain with a subfolder - I genuinely think it looks a bit neater.  Consensus is somewhat split over the whole "which is better for SEO", I'd stick with a subfolder if it's easy for you to implement and you're not too bothered about presentation in the URL.