Like the day before, the Slovak, winner of the general classification of the World Cup last season, clearly took the advantage over the superstar of the discipline, dominated by 47/100 in the northern night.
The podium was identical to that of Saturday with the German Lena Duerr in third place, 78/100 behind the winner.
With this victory, Vlhova comes back to Shiffrin at the top of the World Cup standings with 260 points.
The next explanation between the two champions is scheduled in the United States, in Killington (Vermont), where a giant and a slalom will take place on November 27 and 28.
The 26-year-old American made a fatal mistake in the wall in the second round that prevented her from snagging her 71st victory on the world tour, the previous one dating from October in the open giant at Sölden, Austria, where Vlhova was third.
The American Mikaela Shiffrin, during the 1st round of the Levi slalom, on November 21, 2021 in Finland Jussi Nukari Lehtikuva / AFP
Her two second places consolidate the return to the highest level of the triple winner of the Big Globe (2017 to 2019) after two complicated seasons, marked by the sudden death of her father in 2020 and the Covid-19 pandemic.
The fastest in both heats, 26-year-old Vlhova confirmed her predilection for the Finnish resort by winning there for the fifth consecutive time in the slalom, a record.
This is the 22nd success of his World Cup career.
She had been training on the spot for several weeks while Shiffrin had to rest for a few days after Sölden due to back pain.
Slovakian Petra Vlhova, during the 1st round of the slalom in Levi (Finland), on November 21, 2021 Jussi Nukari Lehtikuva / AFP
Switzerland's Wendy Holdener took fourth place on her return to competition, after a hand injury that took her off the slopes at the start of the season.
After her sixth place the day before, the Austrian Katharina Liensberger, world champion in the discipline last winter at Cortina d'Ampezzo, finished eighth at 1 sec 64 behind Vlhova, her worst result since March 2019.
© 2021 AFP