Unfortunately they tell pretty different stories of the race. The University of New Hampshire Survey Center poll has it as a 7 point race. The Suffolk University poll has Trump beating Haley by 20 points.
Fwiw the University of New Hampshire polls have tended to show Trump with less support than average. So my bias would be to lean more towards the Suffolk University poll here as the true state of the race.
As the University of New Hampshire poll shows though undeclared voters are the key demographic for Haley in the state. If she is going to win this or make it close she needs to get those undeclared voters. The big question is how many of those voters will choose someone like Christie over her. Trump voters are pretty locked in at this point. Her base of support less so.