No difference on the modulator although there are 3 different ones, STC2778 for a car up to VIN WA410481 (two wheel traction control), SXC100010 from VIN XA410482 (four wheel traction control), and STC2779 for a car without traction control. ECU is slightly more complicated, with ANR1250 up to VIN MA316175, ANR4898 from TA316175 to WA410481, SRD100290 from XA410482 to XA417534 and SRD100500 (superseded by SRD100501) from XA417535 to end of production. But, from your point of view, they are the same on automatic, manual, petrol or diesel, so all you will need to find is the correct ECU for your VIN.
I have the ANR 2238 modulator ( no TC) i didn't umplug the abs ECU yet to see it's code but i will soon. I don't have a TC light but i haven't check if there is a bulb in there. So if i find a Rear TC modulator and if needed ECU must i also buy another loom to go with it?