[fw-mvc] Calling Dojo

Hello !

What difference would be in performance, if using dojo in a class like :
class Default_Form_Prjhead extends Zend_Dojo_Form and declaring all dojo
elements below it

against directly using in view - form.phtml as

<div class="formRow">
<label for="firstName">First / Last Name: </label>
<input type="text" id="firstName" name="firstName"
dojoType="dijit.form.ValidationTextBox"
required="true"
propercase="true"
promptMessage="Enter first name."
invalidMessage="First name is required."
trim="true"
class="mytextbox.dojoInputField"
style="width: 10em;"
/>
</div>

According to my knowledge the latter approach using directly in view gives
more control, but not sure of performance. Do I need to custom build my
dojo.js using builder ?

Thanks in Advance !

Naimesh