My question concerns the correct use of G*Power for sample size analysis for either a "multiple linear regression with R² deviation" from zero or a "multiple linear regression with R² increase".

G*Power is estimating a way higher sample size in the first Regression model.

I´m planning to analyze the influence from one predictor (categorial) on one outcome and I want to control for about 11 confounds. Can you help me?

Thank you!