HyperX Clouds
Frequency response: 15 - 25.000 Hz
Transducer type: Dynamic, Closed Ø 53mm Driver
SPL Sound pressure level: 98 ±3 dB
Connection: mini stereo jack plug (3.5 mm)
Orion Pros
Driver Diameter : 50 mm
Driver Material : Neodymium magnet
Frequency Response
Headphone : 20 ~ 20000 Hz
Impedance
32 Ohm ± 3 %
Input Sensitivity
-30 dB
Cable Length
2.5 meter
Noise Cancellation
Passive (noise isolation) :
Maximum > 30 dB
The prices are roughly the same, and both pretty much balance each other out performance wise.. so tough call, your choice.