Cloud9 and Immortals are two of the top CSGO NA Teams. However there is a stark difference in the matchup based on offline and online events. According to statistics revealed by lurppis, Cloud9 have won all their BO3 matches online.
However once the match becomes an offline match at a major tournament, Cloud9 definitely seem to fall off. They do not have the same impact as they do online and that has been shown in their results.