I have to agree with both Pashmina and Opt. Springmetrics.com and SEOmoz are totally different tools. For optimizing your site (or your client's site) for SEO, SEOmoz is the way to go - no question. When you want to measure the revenue and conversions for the keywords for which you have optimized (along side of your other PPC, email, and social media campaigns), then you use SpringMetrics.
Posts made by thirdside
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RE: Http://www.springmetrics.com/ vs SEOMOZ.org