I know some will shoot me down, but for me, which was the higher specification car or rarest is not linked to the price I will pay or which one I want to buy.
I remember the EX coming out when I was 13 or so, I also remember sitting in a caravan on holiday reading Radio Race Car and drooling over the standard Intruder, but never being able to afford it.
Naturally, as soon as I had my own cash, it was the Intruder I wanted, I had no interest in the EX as it wasn't the childhood dream. (which is the only reason I buy these cars now!)
So as rare as the EX is, I would always want the Intruder... and an Egress, YZ10, RC10 worlds etc etc...