Two matches where the picture is clearer on one side than the other. In Sydney, one side has the stronger home base and the other has stalled in front of goal. In Daegu, the Korean Series is tied and the pitching on both sides is better than the two high-scoring finishes so far suggest.
Sydney against the Mariners: Sydney sit mid-table and are roughly level on process, but the Mariners have no win in three league games, have scored once in two away matches and concede a lot of shots. Their centre-back Sainsbury is out and was already missing for their last two games, so that weakness is current. Sydney's club news says the goalkeeper and a defender are back in the squad, so the back line is less thin than the supplier list suggested. Sydney have won eight of thirteen home meetings between these sides. I expect a patient first half with Sydney taking territory and corners, and a one-goal or two-goal home win. That's why I'm siding with Sydney to win.
Korean Series Game 3 in Daegu: Samsung's Jurado has been excellent in the playoffs and So Hyeong-jun has a strong postseason record for KT. Both bullpens get a rest day, and the air is cool, which tends to hold fly balls in. The Samsung bullpen is short its closer and the wind is strong, so late runs are possible, but the starters should shape the first six innings. I'm leaning toward a lower-scoring game and taking the under.
