Radiometric correction for sentinel 2 images

In addition to the atmospheric correction, is radiometric correction needed for sentinel 2 images?

Level-1C products are top-of-atmosphere reflectance (TOA)
Level-2A products (after processing by sen2cor) are bottom-of-atmosphere reflectance(BOA)

additionally, sen2cor makes use of a DEM to normalize slopes (more or less). Sen2cor DEM parameters