If you happen to be placing the order in person through a Japanese craft house.. they'll do any headstock you like :lol
As for the carve on the upper horn, i presume you mean the conture which almost comes to a raised point that runs down the horn. On a custom shop model or older hand built Horizon, you'll see this is very pronounced because it's a trademark of the ESP Carved top design.
The production horizon guitars you see today probably have this design feature added with a CNC machine or similar, so it lacks the depth and radical sweep to a fine point, that the hand carved instruments have. They also have slightly thicker finishes compared to Custom shop guitars, so the point is further obscured by the laquer coat.