Siberia and SOCAR (nominally from Azerbaijan) were the pre-tournament favorites, and they came into round 5 with 4-0 records. Better still from a competitive standpoint (though not ideal in the bigger and more important picture), the two teams were led by Vladimir Kramnik and Veselin Topalov, respectively, which if nothing else guaranteed a hard fight at the top. In the end Kramnik won a great game and Siberia won the match, and that ultimately made the difference. Both teams went on to win in round 6 (with Kramnik defeating Vasil Ivanchuk to defeat his fourth consecutive 2700+ player in the tournament!) and both drew in the final round, round 7.
Thus Siberia won the 2015 European Club Cup with 13 match points (two points per win, one per draw), SOCAR took second with 11 points, and another (nominally) Russian team, Mednyi Vsadnik (led by Peter Svidler) took the bronze. They too finished with 11 points, as did the "Italian" team Obiettivo Risarcimento Padova (led by Peter Leko, they very nearly beat Siberia in the last round, and Leko managed to hold Kramnik to his only draw of the event).
I've uploaded Kramnik's four wins, with comments (based on his post-game remarks) to the Topalov game, here.