http://www.crownaudio.com/amp_htm/xti.htm

Bridge-Mono, 8 ohms - 1000 watts

vs

http://www.crownaudio.com/amp_htm/xls.htm

Stereo, 8 ohms (per ch.) - 380 watts (760 watts total)

Which would be better as a subwoofer amplifier? Reliability, quality, etc?