Gaming wise both are not that far off, with proper emphasis on bass for fps games. The Siberia v3 has more streamlined control on hthe headset though.
The quality for music and video though, I would say the hyperx cloud wins pretty convincingly, its sound quality is probably among the best in its price range. However the hyperx cloud works better if you can pair it with a good sound card or an amp given its 60 ohm drivers that can take in more power. Still works fine without though.