The physical radio is the same for nRF54L15, nRF54L10, and nRF54L05.
When used in identical hardware design and running identical software, the performance of nRF54L15, nRF54L10, and nRF54L05 is expected to be the same.
nRF54L10 and nRF54L05 have reduced memory capacity compared to nRF54L15. Certain radio applications that require large memory use are not fully supported on these variants in the same manner as on nRF54L15.