Support different sets of fields for each view type

First, the titles need to be more distinct.

Second, this is a very large feature request, and I have plans for something that will take care of this in Views 2. I'm not going to do this the way you suggest, the implementation would be much harder than it sounds like.

Just posting here to provide a temp solution for those looking for one:
I was looking for this exact functionality myself (i.e. different fields for a block) - this can be achieved by using the argument handling code section:

You can do something like:

if ($type == 'block') {
  $view->field = array(
            array
                (
                    'vid' => '3',
                    'tablename' => 'node',
                    'field' => 'title',
                    'label' => 'Event Name',
                    'handler' => 'views_handler_field_nodelink',
                    'sortable' => '0',
                    'defaultsort' => '0',
                    'options' => 'link',
                    'position' => '0',
                    'fullname' => 'node.title',
                    'id' => 'node.title',
                    'queryname' => 'node_title',
                ),
              );
}

The example would simply return a single field (node title) in a block view. Otherwise the view is unaltered and shows whatever fields were defined via the GUI.

Note that 'fullname' and 'queryname' are absolutely required or you will get errors...

andre

Will this work even if no arguments are specified?

Yes

This was fixed. You can override fields on each display.