| God/Dog |
1] Intrugue Oracle's Assumed Form (Sp): You can change your appearance at will, as disguise self with a caster level equal to your oracle level. At 7th level, you can choose to actually transform, which works the same way but counts as a polymorph effect instead of an illusion and doesn’t allow a Will save to disbelieve. At 11th level, the ability lasts until you dismiss it or use it again, allowing you to even keep it active while you sleep. At 15th level, when you use this ability as a polymorph effect, you can gain the size bonus to your ability scores and additional racial abilities as if using alter self.
2] Vigilante talent, Malleable Flesh (Su) (Chronicle of Legends pg. 7): Whether through mutation or alchemy, some vigilantes have flesh that is as moldable as clay and as fluid as ink. A vigilante with this talent gains the shapechanger subtype and the compression universal monster rule. In addition, the vigilante can alter his appearance as disguise self, except that the changes are physical rather than illusory. However, aspects of the vigilante’s aesthetic persist in all forms, halving the bonus on Disguise checks gained from this effect and from seamless guise. At 12th level, the vigilante can pass through narrow openings, even mere cracks, along with any item he wears or carries (to a maximum of his light load).
From what i can see the big difference is that one is a polymorph effect while the other isn't.
This implies that in Assumed form's case the polymorph rules apply while they don't for Malleable Flesh.
Th relevant polymorph rules are:
1] In addition to these benefits, you gain any of the natural attacks of the base creature, including proficiency in those attacks. These attacks are based on your base attack bonus, modified by your Strength or Dexterity as appropriate, and use your Strength modifier for determining damage bonuses.
2] If a polymorph spell causes you to change size, apply the size modifiers appropriately, changing your armor class, attack bonus, Combat Maneuver Bonus, and Stealth skill modifiers. Your ability scores are not modified by this change unless noted by the spell.
3] While under the effects of a polymorph spell, you lose all extraordinary and supernatural abilities that depend on your original form (such as keen senses, scent, and darkvision), as well as any natural attacks and movement types possessed by your original form. You also lose any class features that depend upon form, but those that allow you to add features (such as sorcerers that can grow claws) still function.
What do you think? Should they work the same?
To me the answer is yes, because of the absurdity that Malleable Flesh would create if it didn't work like, or wasn't treated as, a polymorph effect.
The first one coming to mind would be a character with horns or a tail that turns into a creature without those appendages whiste still being able to attack since the polymorph rule n°3 never had to be applied.