According to the official Spy x Family Fanbook , these were the original visuals for the series' main characters. Recently, more sketches were released showing what Loid , Anya , and Yor would have looked like before the manga's release.

The project was presented to the manga editors who ultimately opted for a change in the look, which is what we know today .
The Spy x Family anime is airing every Saturday and is produced in collaboration between WIT and Cloverworks . The series is scheduled to have 25 episodes divided into two parts and a 3-month interval .
Synopsis:
In short, the story of this unusual family revolves around the spy codenamed " Twilight ," who spent his days on secret missions, all for the dream of a better world. But one day, he receives a particularly difficult new order from the command center. For his mission, he must form a temporary family and start a new life?! A spy/action/comedy about a unique family!
Finally, what did you think of the original Spy x Family visuals? Leave your comment on the subject!
Via: Fanbook