Torin Yater-Wallace took the honours in the men's event, edging out France's Thomas Krief by just 3.00 points to claim the season opener.
A second Frenchman Benoit Valentin came third in the afternoon final at the Olympic-grade halfpipe at the Cardrona Alpine Resort.
In the women's event, Devin Logan saw off strong competition from Japan's Manami Mitsuboshi to claim victory by 3.2 points.
Mitsuboshi's compatriot Ayana Onozuka grabbed third place, ahead of home hope Janina Kuzma and Switzerland's Mirjam Jaeger.
Qualifying for the snowboard halfpipe event starts on Saturday with the semis and finals scheduled for Sunday.