It really depends on what you are looking for... Both are of different specs and looks.
Barracuda HP1
* Razer Fidelity™ gaming audio engine
* Eight discrete drivers (six for mid-high frequency, two for sub-woofer)
* Six-channel analog input
* Individual volume controls: front, rear, center, bass and master
* Detachable uni-directional noise-cancelling microphone
* Razer High Definition-Dedicated Audio Interface™ (HD-DAI™ connector)
* 2m cable
Audio Characteristics (Headphones)
* Frequency response: 50~20,000Hz
* Impedance:
- Front speaker: 64Ω
- Rear speaker: 32Ω
- Centre speaker: 64Ω
- Sub-woofer: 8Ω
* Total power rating: 330mW RMS
Audio Characteristics (Microphone)
* Frequency response: 50~16,000Hz
* Sensitivity: -58 ± 2dB
* Impedance: 2.2KΩ
Piranha
* True-to-life audio quality with superior clarity and bass
* Adjustable, noise-filtering microphone for clearer in-game communication comfortable, ergonomic and adjustable earphones suitable for prolonged use.
* In-line remote control with convenient volume and microphone muting adjustments
* Single-sided cable for hassle-free usage
* Durable braided fiber cable protection
* Internet telephony compatible
* Compatible with most major operating systems
* Usable with CD, DVD and digital audio players (via 3.5mm minijack)
Specifications
Headphones
Freq. response: 18 – 22,000 Hz
Impedance: 32 Ohms
SPL (@ 1 kHz, 1 Vrms): 114 dB
Cable: 3.0 meters
Microphone
Freq. response: 80 – 15,000 Hz
Sensitivity (@ 1 kHz, 1V/Pa): -38 dB
Impedance: ~2 kOhms
Pick-up pattern: Uni-directional