RAID 1 with Black & Green Drive

I currently have a 750GB WD Caviar Black drive(32MB cache). Would using a 750GB WD Caviar Green drive for the RAID 1 mirrored drive handicap my Black drive in any way? The Black is 7200RPM and the Green has Intelliseek, so its rpm seems to be variable or at least different from the Black. I was hoping to save money and power consumption/heat going with this drive instead of a second Black drive. The RAID setup would be done through the motherboard controller as opposed to at the OS level.

MB: ASUS P7P55D EVO LGA 1156 Intel P55 ATX Intel […] 6813131407

OS: dual boot Ubuntu 9.10 x64, Windows 7 x64 (with a shared storage partition)

CPU: i7 860

HD: Western Digital Caviar Black WD7501AALS 750GB 7200 RPM SATA 3.0Gb/s 3.5" […] 6822136283

Drive I’m looking at:
Western Digital Caviar Green WD7500AADS 750GB 32MB Cache SATA 3.0Gb/s 3.5" Hard Drive […] 6822136359


They would at lease need to be matching drives, so you need another black drive. Since there only $10 different i would just go with the black.