Definitely different enough to own both - I find TV is a sweet vanilla bomb all the way through, whereas Chergui's sweetness tempers as it dries, and the honey and hay notes give it a bit more of a dirty aspect.
Both very good, even great fragrances, but for me only Chergui is FB worthy. Along with Cuir Mauresque and MKK, it is the pinnacle of the SL house.
Be careful not to write-off Chergui on the restrained opening minutes, as I was tempted to do the first time. This juice blooms into a powerful tobacco fragrance that can fill the room if you're not careful. Two sprays maximum.