XMLStreamWriter与StringBuilder或StringBuffer

Question

使用XMLStreamWriter是否有任何实质性优势：

Writer out = new StringWriter();
XMLStreamWriter writer = XMLOutputFactory.newInstance().createXMLStreamWriter(out);
writer.writeStartDocument();
writer.writeStartElement("FirstElement");

而不是StringBuilder或StringBuffer？

StringBuilder builder = new StringBuilder();
builder.append("<FirstElement>");

我在这里谈论非常简单的XML文档，没有名称空间。