Compare to the Plant and Animal form spells on P114.
The 25th level version vs the 15th level version.
Those are clear.
It's a bit more iffy with Living change, in that it specifies physical form is gained, but not special abilities like darkvision. .
"Special Abilities" no "Physical Form" yes is marginal. . .
I'd likely not make the dwarf version of a human caster gain dwarf stat bonuses for instance. . .
I'd likely allow 11th level living change to allow similar to the 15th level animal form. . .if you're a fish you can swim, if you're a turtle you have a shell, etc. If you're a bird you can fly.
But if you're an octopus, you can't see in near dark or change color.