4 wire O2 sensors compatibility

[undar8ed1]

Both the VS V6 and gen 3 use 4 wire O2 sensors are they the same because the plug is identical, also did the ecotec keep the 4 wire set up until the VY?

[showbags]

my vt has 2 wire ones

[acarmody]

My VX has 2 wire sensors.