This probably corresponds to compute. ElevenLabs can burn compute for now, Suno can’t.

They also seem to use a different encoding scheme which has more bandwidth and less artefacts up front. If you download a WAV from Suno, you still essentially have MP3 quality, just serialized to a WAV file. The elevenlabs WAV has full audio bandwidth instead and I checked frequency sections with a parametric EQ and noticed that e.g. the cymbals go high up in spectrum (which is not obvious in the given sample song where middle and bass frequencies dominate); with a bit of mastering the result is much better, but I posted the original here. I can also upload the WAV file if needed.