No it's different things...
You're calling a potato banana... lol
In mythology, folklore and speculative fiction, shape-shifting is the ability to physically transform oneself through an inherently superhuman ability, divine intervention, demonic manipulation, sorcery, spells or having inherited the ability.
Shapeshifting is limited to yourself...
What is the power of transmutation?
The power to alter the forms/structure of matter/energy. Sub-power of Form Manipulation, Matter Manipulation, Nuclear Manipulation and Structure Manipulation.
But they're both sub-powers of Form Manipulation...
Same family, but your sister isn't your brother either, right?