Velocity, qual dos dois?

Front-end
#1

Fala pessoal, tudo bom?
Qual a diferença de eu usar assim numa servlet:

[code]public class MeuTesteVelocity extends HttpServlet{
/**
* Comment for <code>serialVersionUID</code>
*/
private static final long serialVersionUID = 1L;
public void init(ServletConfig config) throws ServletException {
String docRoot = config.getServletContext().getRealPath("");

    Properties p = new Properties();
    p.setProperty("file.resource.loader.path", docRoot);

    try {
        Velocity.init(p);
    } catch (Exception e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    }
}
public void service(HttpServletRequest request, 
        HttpServletResponse response) 
        throws IOException, ServletException {
        
        VelocityContext context = new VelocityContext();
        context.put("nome", "Igor");

        Template template;
        try {
            template = Velocity.getTemplate("ola.vm");
            response.setContentType("text/html");
            template.merge(context, response.getWriter());
        } catch (ResourceNotFoundException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        } catch (ParseErrorException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        } catch (Exception e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }

    }

}[/code]
Ou assim:

[code]public class NovoTeste extends VelocityServlet {
/**
* Comment for <code>serialVersionUID</code>
*/
private static final long serialVersionUID = 1L;

public Template handleRequest(HttpServletRequest request,
        HttpServletResponse response, Context context) {
    context.put("nome", "Alberto Folião");
    Template template = null;
    try {
        // buscando o template
        template = getTemplate("ola.vm");
    } catch (ResourceNotFoundException rnfe) {
        // nao acho o template!
    } catch (ParseErrorException pee) {
        // syntax error no template
    } catch (Exception e) {
        // excecao lancada pelo codigo usado durante a renderizacao/merge
    }
    return template;
}

}[/code]

Valeu, abraços

#2