I think it's an order of magnitude more likely in the Nordic study, unless I'm misreading something. From the Discussion section of this article - Reports of

I think it's an order of magnitude more likely in the Nordic study, unless I'm misreading something. From the Discussion section of this article - Reports of myocarditis and pericarditis after COVID-19 vaccination have increased since the report by Albert et al. [6]. The frequency of occurrence of myocarditis and pericarditis has been reported in a US military survey including 23 cases of myocarditis/2,800,000 persons with a mean age of 25 years, all males, and no deaths [7]. A total of 40 U.S. hospitals reported 20 cases/2,000,287 with myocarditis and 37 cases/2,000,287 with pericarditis; both groups showed male predilection, mean age of onset of 36 years for myocarditis and 59 years for pericarditis, and no deaths in either group [8]. The Nordic cohort study reported that myocarditis occurred in 1,077/23,122,522 patients and pericarditis in 1,149/23,122,522 patients; both were more common in young men aged 16–24 years and most commonly occurred after the second vaccination [9].