Its possible to have muliple forms. Between them its possible to swich by a dropdown.
To get this dropdown-field you would create one configuration in the MIGX-configurator for each form.
For this configurations you need only fill out the formtabs.
Then for the MIGX-TV itself you would choose the configurations under Formtabs -> multiple formtabs
This will create a dropdown on your Form with the names of your configurations.
If you select one of them, the Form swiches to the selected configuration. Its a good Idea to have the same field-names for all two or three Forms.
You can use the hidden inputTVtype for input-fields which you don't need on all Forms.
This way you don't loose information, when swithich from one form to another one.
to switch between different chunks while listing on frontend you can use this property:
&tpl=`@FIELD:MIGX_formname`
this will switch the to tpl-chunks with the same name of the selected configuration, which is stored in the field: MIGX_formname