The Spurs have played really well over this tough stretch, but we'll catch them in April. They've got the Lakers, Orlando, Denver, Dallas, and some tough teams in Memphis and Houston.
I wouldn't count out passing OKC also. They have games in April at Boston, at Dallas, at Utah, Home against Denver and Phoenix.
Tough stretches to end the season for both teams with very difficult road tests.
I know Portland has two (most likely) road losses on their schedule in Denver and the Lakers, but we also have the Knicks, the Kings, the Clippers and the Warriors on our schedule.
I think Portland finsihes ahead of the Spurs, and I wouldn't be suprised if they finished tied with OKC.