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Given that going with a www or non-www TLD is a coin-toss in Google's eyes, I'm curious as to how this relates to Moz's spam score (if at all)? Specifically, we've got a client who has several sites across a number of industry verticals, and for some of them, the www and the non-www versions of their websites are both in play (sigh). Obviously we'll sort that out shortly, but my question is why, when we put both TLDs into Open Site Explorer does the www and the non-www version of the sites get different spam scores? With some of their sites (www v non-www) the difference in the spam score might be a 2 for the www v a 3 for the non-www. But in others it might be 0 for the www v 8 for the non-www! And it's unclear which one is the 'real' spam score, as there seems no rhyme or reason to the results.

Anyway, any thoughts from the room would be appreciated.

Thanks Zoe, awesome response. Your answer backed up what I thought, to be fair. But as we're rolling out a large multi-site international strategy for a client (with little margin for error), I figured it was a good idea to get a second opinion, just in case!

Looking to move several sites from my current hosting provider, and am considering moving them to cheaper, overseas hosting providers. What's the current thinking of how this will impact local SEO results?