In the third, broadside photo Curl posted you can really see where his boss is developed to and how it is soft in front.

Here is another young bull that is huge in spread but too young to be considered when the photo was taken. This bull was turned down in November in Masailand, TZN (Tempting but I am glad we let him go... PH guessed him at 47" and I think he was all of that). Difficult from just one picture but we looked him over pretty hard for obvious reasons. He was fully hard in back but soft in front and forward part of the middle. From what I have seen/read, that is how bulls develop, from the back to the front. For this reason, you really have to get a good look at a bull before making the decision to shoot/not shoot.

Compare the above bulls to this bull and you can see the difference in bosses (This bull taken in same trip ended up roughly 115 SCI and 42.5" spread for reference);