I have the same problem:
B02 (Blue) after SEN2COR in 10m:
B02 (Blue) after SEN2COR in 20m:
Is this a mistake in the SEN2COR script or is there again some scaling problem in the data?
Here a comparison of the spectral profiles of the bands 2, 3 and 4 in 10m-resolution before the SEN2COR-Correction, and then in 10, 20 and 60m resolution AFTER the atmospheric correction. Shouldn't the 10, 20 and 60m-images be similar? I picked a forest Pixel in a homogenous region. The 10m result seems to be really off!
EDIT2: Another Question: Is there a reason why for the corrected dataset, Band 08 is only available in 10 m, where all other 10m bands are also written in 20 and 60m?