std::unique_ptr::release() vs std::move()

I have a class that represents a runtime context and builds a tree, the tree root is held in a unique_ptr. When building the tree is done I want to extract the tree. This is how it looks (not runnable, this is not a debugging question):

class Context {
    private:
    std::unique_ptr<Node> root{new Node{}};
    public:
    // imagine a constructor, attributes and methods to build a tree
    std::unique_ptr<Node> extractTree() {
        return std::move(this->root);
    }
};

So I used std::move() to extract the root node from the Context instance.

However there are alternatives to using std::move() e.g.:

std::unique_ptr<Node> extractTree() {
    // This seems less intuitive to me
    return std::unique_ptr<Node>{this->root.release()};
}

Is std::move() the best choice?