Euro central bank interest rates: -0.5 % [1]
Euro inflation (Nov.): 4.9 % [2]
This yealds a Euro netto interest rate of -4.95 %
Dollar FED interest rates: +0.05 % [3]
Dollar inflation (Nov.): 6.8 % [4]
This yealds a Dollar netto interest rate of -6.75 %
So it seems that the real interest rate difference is aprox. 2 % in favour of the Euro.[1] The article mentions -1 %, but I couldn't find a confirmation for this.
[2] https://ec.europa.eu/eurostat/documents/2995521/11563387/2-3...
[3] Per article.
[4] https://tradingeconomics.com/united-states/inflation-cpi