Let's consider this:
IQ18 Spell Shape Change remains as written in book
Paper Tiger IQ16 (T) EN6 R:Self
Caster changes form into a creature it has seen at least 3 times before. The Attributes of the caster remained unchanged but the special abilities, movement and AR of the creature are conferred (flight, fire breathing, webbing etc.). The caster assumes original form if knocked unconscious, killed, or the spell effect ends.