SCORM has been around and supported for a long time by Moodle core, Tin Can is a new technology and has only slight support in Moodle in the form of a plugin and is not widely supported by other tools. However it seems to be the successor to SCORM and is likely to be important in the future. You can see a comparison between the two here
http://tincanapi.com/scorm-vs-the-tin-can-api/
In my experience you are better off using Core Moodle features as SCORM can be unreliable. One of the good things about SCORM is there are a wide selection of editing tools that can create some visually impressive results.