I think this rep is using a7753 movement which one serviced is very reliabe.Imho it´s got too many flaws to justify the price and A7750 risks of the automatic version.
On the other hand and just to satisfy the urge of having it, while getting a reliable beater,
the sub $200 quartz version is well worth the while.
Gen is ceramic, rep is black coated DLC. Gen has bright deep red, rep red is kind of not glowing and dull. Gen has relief on the numbers of the subdials, on the rep they are painted. Engravings on the outer bezel are not deep enough. ...
As there is no specific buyer for the product You almost don´t see it (except the much cheaper quartz versions with even more flaws but at a good price and with the reliability of quartz). For going real ceramic there are options, but not in the Tudor range.