Pretty hilarious we are breaking even! I think mine grows better (mostly because it's closer to Greater Mutagen), but they seem very competitive.
Agreed. I'd hate to be the meat in that sandwich.
This doesn't matter for most +x enhancements because they do not provide an additional enhancement bonus. But for furious, or bane, the +2 is applied to the weapon, not any temporary spell effects.
Ah, I see what you're saying now. I would agree that for DR purposes it's a +3. I've just always seen it read that if GMW is giving a weapon an enhancement bonus (even if it's an altered kind), then Furious or Bane, by definition, add to an enhancement bonus. I guess it could read either way easily enough.
Anyhow if Furious is ruled not to add then rage is a +2 attack and damage and Furious is a means to beat some DR on a weapon that needs at least Agile and ideally Spell Storing. Not as big a boost, but still potent.