Before we begin - let us see what do these two abbreviations stand for. - SPS means SharePoint Portal Services - STS means SharePoint Team Services i.) Document management system in SPS is better than STS. ii.)The search engine in SPS is better, more efficient and possesses the capability to crawl multiple content sources in comparison to STS. iii.) If Document Management is not required, STS is easier to manage for team environment while SPS is better for an organization where Document Management is required.