Similar but not identical, somewhere in between I think. They have a MAF like the MK2 system, but early 2e engines dont have a crank position sensor. The later (ADY?) blocks have a crank position sensor, and a different dizzy & hall sensor (The early 2e dizzies can be used with the MK2 digi fuel injection system if you fit the bottom end, but the later dizzy will not work). Both have a lambda probe as well.