@fernandocortes I think the difference in the two is level of customer service…
A social media manager, manages the social media assets of a company. Are the tweets going out on time? Is Facebook posting being done regularly? Are you signed up for social profiles and are those profiles filled in completely and do they include your keywords? A social media manager is an administrative position for your company.
A Social Media Community Manager, manages your customer service utilizing social media assets. Yes, they still make sure the tweets and posts are done in a timely manner, but they also engage in the community. They make sure your company has an active presence in the community, They reach out to the community, they listen to the complaints and act-on and solve customer issues. A SMCM takes “ownership” of the community and your brand and is proactive in building your brand and enlarging your community base.
I think a SMM is more passive and a SMCM is more active. For small businesses, soloprenures and commissioned sales people a SMM would be appropriate to help with social media marketing, For large brands like Southwest Airlines, or Coca Cola a SMCM would be appropriate.