Last weekend Prevc recorded a first and second-place finish and he was back on the podium again in Engelberg, Switzerland to lead a one-two ahead of his 16-year-old brother Domen.
The 23-year-old was a clear leader after the first round having posted a score of 151.4 – Domen the nearest challenger on 138.2.
And while Domen closed the gap on the second jump, improving his score to 145.3, it was not enough to reel in his brother who scored 145.7 to finish with a combined score of 297.1.
Japan's Noriaki Kasai completed the podium in third on 273.5 but the day belonged to the Prevc brothers.
Older sibling Peter continues to lead the overall standings with 464 points after eight rounds with Severin Freund second on 359 after finishing eighth in Switzerland.