I have no idea about wither of them, the only thing that i know is that they are overpriced.
HERTZ MLK2 - only £1,099.99 inc VAT : Ray Smith Car Audio
HERTZ by Elettromedia - Special Car Stereo
for the price of them you can get a full PA system for a band, and chuck that in your car. itd be ten times louder and twice as clear.