I have seen a few postings asking questions about the two. I have both and would like to share information with everyone. In functionality they are exactly the same. Both do the exact same in regards to movements and commands. They both respond and react exactly the same. I have listed some of the items and included some pictures.

RoboTyrannus                    RoboReptile

Item # 8063                       Item # 8065

Remote - Same                   Remote - Same

Hood - Same                       Hood - Same

Manual - Same                    Manual - Same 

Controls - Same                  Controls - Same

Physical Appearance of The RoboTyrannus is the same as The RoboReptile except it has 4 horns on the head, five spikes down the neck and a dorsal sailfin on the back. Both have made in 2006 on The User Manuals. Here are a few pictures:

Hope this clears any confusion for future owners.