Are Suno cheers different from crowd noise in a real live recording?

Yes. Real crowd noise is usually microphone bleed from an audience in a room. Suno cheers are generated as part of the song itself, so they can be blended into vocal reverb, cymbal shimmer, transitions, and stereo ambience.

The Heavy Decrowd workflow uses SAM Audio with the target prompt "music with singing" to separate the musical content from the synthetic audience layer.