Well, I'm working off the DA minis themselves. Yes, it's pretty similar, but none of the named units in DA are the Armoured Cav.
Honestly, I think that the manufacturer had just got tired/bored by then. The initial paintschemes are often very good - the Capellan base scheme, Jade Falcons, Banson's Raiders, Stormhammer, etc - but have nothing to do with BT schemes. But by the end, the DA Davion and Lyran house schemes are "flat colour plus a few bits of white".
And seen as my project is to do IWM minis in the official House DA paintschemes ...