I've got a related question touching Invulnerability and Healing Factor. Note that I get that Invulnerability implies to the stress you're taking right now and KEEPS it from becoming stress, while Healing Factor applies to the stress you already took, and that Healing Factor takes an action, while Invulnerability does not. But on one level, each works as "Spend a PP to make [this category of stress under these conditions] go away.
Question: How much does the die-size of your related power trait matter? I have a notion that somewhere in the OM it says that it matters like this for the Healing Factor SFX: If your Stamina die size equals or exceeds your physical stress, spending the PP makes the stress go away completely, but if your Stamina die size is less than your physical stress, spending the PP just steps your stress back by -1. Is that the case, or do I misremember?
Then, with Invulnerability, does die-size of your Durability power trait matter the same way? e.g. The Thing has Godlike Durability D12, so if he spends a PP on Invulnerability he ignores this here incoming D10 physical stress. But Little Thing, his nephew from Earth-909 has Invulnerability, but only Enhanced Durability D8. So if he spends a PP on Invulnerability, does this here incoming D10 physical stress go away completely, or just step back to D8?