The difference is that sending a "loadbang" message to [thispatcher] executes the loadbang-trigger as it would happen when starting a patch and sending "send loadbang bang" to a [universal] object just sends a bang to all loadbang objects. In detail the difference is:
Using [thispatcher] all [loadbang] and [loadmess] objects as well as all loadbang() functions in JavaScript-Objects and Java-Classes are triggered.
Using [universal] only the specified objects (in this case the [loadbang] ) will receive a bang. JavaScript and Java loadbang() fucntions will not be triggered.