Blind Scan analyzes all signal coming down from the satellite and creates a transponder list of compatible transponders and logs available services.
Full scan (or satellite scan) does not look for new transponders. It only scans transponders that were preprogrammed or previously added in the software.
Blindscan is the best method for find new or occasional use services. After performing a blindscan, follow-up with a full scan (or satellite scan) to log the majority of compatible services.