The raison d’etre for short nosed saddle is to be able to sit far forward on the bike. But comfort and fit remains a concern that is not attached to the length of the nose.
The red line shows the saddle centre (measured at its 80mm width). A cyclist would need to match these lines on both saddles to get the same position the bike. Note how much movement the rails allow them on both directions. The short nosed can be moved forward and the standard one backwards.
The question is: Do you want to sit even further forward on a TT/Tri bike that is already designed to put you forward? Or would a normal saddle allow you a good position that is also within the UCI rules?