2016, there's no single thing that can be called "human nature"--it varies too much by context. And even if it did exist in some simple fashion, it would not be helping you to pick a starting rotation either: it would have bigger fish to fry.
That said, I agree with Richards: Lin has a greater upside as a starting PG, because he's a) very intelligent; a deep student of the game; c) completely unselfish; d) strong and quick (not Beverly quick, but quick); e) gifted with exceptional court vision (say Hubie Brown and Magic Johnson); and f) has demonstrated a fierce will to win and a remarkable ability to find resourceful ways to rise to the occasion in crunch time.
He's still inconsistent: he's just finishing his first full year. If the notion of "starter" versus "sixth man" means anything, Lin has more starter traits and Beverly has more sixth man traits. Both are real assets--I wish you'd be happy that they're there and stop pitting them against each other! Relax! Enjoy! We don't have a real problem here! Or so it seems to me.