Ember.js - create view using handlebars helper or assign template to View class templateName property?

I'm a little confused about how to define views. I know I can create a view directly using:

{{#view "myView"}}
{{/view}}

but I'm also able to assign a view to a template like so:

<script type="text/x-handlebars" data-template-name="template1">

</script>

App.Template1View = Ember.View.extend({
    templateName: 'template1'
});

Is there any reason to choose one method over the other?

Thanks!