There are numerous ECU's across the entire 8v and 16v range/ years so it's not just a case of sticking any old one in there for it to work properly.
As mentioned the 16v's have EDL which is a primitive version of traction control, it only works at speeds over approximately 15mph I believe and simply utilities the ABS system to slow down the particular front wheel that is spinning faster than the opposing side. It's not great but it's better than a kick in the nuts I guess.