First things first SK are T2, and X6tence are T3
SK are ranked 25th in the T2 section, X6tence are ranked 40th
See where I'm going this this?
Anyway, SK have been putting up great fights with whatever team they happen to come up against. Taking LGB to overtime, taking down HR, and also taking a map from 1337. SK recently have added a new player, BERRY, and his first game was against Penta, where they narrowly lost. I imagine that he may feel a bit more comfortable with his new team, and they may perform better.
X6tence recently lost to 1337 16-0, which is just shocking, and SK were much closer in their games against 1337.X6tence just haven't had much luck recently and I don't see it improving at this point. SK are just too better a team.
Overall, I think SK should win this, + the added safety of BO3 should make this fairly easy for SK. I also think that they may well go on to defeat PENTA in the game afterwards as well.
Good luck, and Happy Betting!