Ginge, you seem to have not answered my question. Which one has a different signal output that means spikey cant use it?

There are different lambda sensors available because some run a heater element in them, and standard car ecu's will only work with the type they have been designed to work with as if they dont see the correct resistance from the heater element they will assume the sensor is faulty.

Spikey has an aftermarket ecu that he can use with any of them as the signal itself is the same on all of them.

So please stop confusing the lad with a load of rubbish that you dont understand the first thing about.