[bigmoe]

A few more small advantages to Gen IV I recall.

Their PCM/TCM is smaller which can make for a neater appearance under the hood or not needing as much space if mounting somewhere in the interior.

The brake light connection to the pcm is simpler, not requiring a special brake light switch, just connect the wire to the hot side of your existing switch.

Fuel line routing is simpler because they don't require a return line.

I also discovered that if you're using a Dakota Digital gauge kit plugged into the OBD port the Gen IV will give more info like oil pressure and gear position.