This is just my opinion only, not based upon any inside info -- but I'm guessing that it came down to Green or Duval, and the staff feels as though they have a much better chance with Green.
On paper, Duval is the clear superior candidate in terms of NBA potential. Bigger, NBA prototype size / skills, clear one-and-done caliber talent.
But Green might also be an elite player across several dimensions in his own right -- possible [probable?] McD's all american candidate, plays at a power house HS that plays a national caliber schedule. Elite scorer / shooter / ballhandler, albeit one of much smaller physical stature than Duval. In other words, a big time recruit who is hardly a slouch, he's just not Duval.
Could be as simple as Green vs. Duval, but we can't land both [only one basketball]. And maybe 2-3 net years of Green > 1 year of Duval. :noidea:
If we land Green, then a lot of the hand wringing over Duval will have been unnecessary, IMO. If we lose out on BOTH, then I'll be right there with the chicken littles.