Ordered lists in django

i have very simple problem. I need to create model, that represent element of ordered list. This model can be implemented like this:

class Item(models.Model):
    data = models.TextField()
    order = models.IntegerField()

or like this:

class Item(models.Model):
    data = models.TextField()
    next = models.ForeignKey('self')

What way is preferred? What drawbacks have each solution?