Spurs gets a real center whose skills will be more appreciated in the team, and they can do without asking Nurkic to stretch the floor, and just let him focus on offensive rebounds and post presence which club desperately needs in non-Wemby minutes.

Suns will likely seek another center whose trade is more than likely not be based around Nurkic, as Spurs are one of the rare teams that could work having his contract without wanting a first to recieve it, and either in limited center minutes, or possibly in his true position as a power forward alongside Plumlee/Ighodaro/center addition, they could use Collins' more consistent stretching abilities.

Basically, both teams get a more fitting profile without giving up too much.