I honestly don't think you'd see any
The AFE 0w-30 ended up being the best oil for our Expedition.
Thanks for the feedback. Since 0W-20 is the factory spec for my engines maybe I will make a subtle change and use Mobil 1 AFE with a 50/50 mix of 0W- 20 and 30, assuming the formulations are essentially the same. This mix should be more robust vis a vis HTHS than the TGMO 0W-20 without any downside that I am aware of.