I'm sure they do.My streamer presents DSD and 16/41k or whatever at a different output level. Any comparison becomes invalid without level matching. Do peOple consider the possibility of unequal level when comparing?
DS/SACD signal is 6dB lower (half) than PCM/CD signal. Most of the players, DACs or playback/streaming devices compensate for that by increasing it 6dB. For the players/DACs that don't do compensation you should manually increase level by 6dB.