That seems to be the only one similar. The talk talk is also upright, and flat with lights to the front. The ports are in a different location, but there is the same selection.
The big difference seems to be that the 3580l is dual band and supports the faster wifi ac protocol, whereas the DSL 3780 is single band and only supports 8011n. If these are software controlled then maybe a flash to the 3580 firmware may work. In all other ways it seems eerily similar.