This really isn’t possible. In order for ACF to find the content the fields and sub fields need to have the same hierarchy and field keys.
I suppose it could be possible if you want to do all the input parsing yourself, get the fields submitted on the front end and update fields in a different field group.
But this is not something that you can do by just creating two different field groups
See
http://www.advancedcustomfields.com/resources/acf_form/
http://www.advancedcustomfields.com/resources/acf-pre_save_post/
http://www.advancedcustomfields.com/resources/using-acf_form-to-create-a-new-post/
http://www.advancedcustomfields.com/resources/acfsave_post/
http://www.advancedcustomfields.com/resources/update_field/
There may be other documentation as well
