Data Model: SQLAlchemy vs. MongoAlchemy

gistfile1.py

# SQLAlchemy
class Prereg(db.Model):
	id = db.Column(db.Integer, primary_key=True)
	email = db.Column(db.String(120))
	fav_restaurant = db.Column(db.String(120))
	location = db.Column(db.String(120))
	reg_date = db.Column(db.DateTime)

	def __init__(self, email, fav_restaurant, location, reg_date=None):
		self.email = email
		self.fav_restaurant = fav_restaurant
		self.location = location
		self.reg_date = datetime.utcnow()

	def __repr__(self):
		return_string = '<email: {0}, date: {1}>'.format(self.email, self.reg_date)
		return return_string

# MongoAlchemy
class Prereg(db.Document):
	id = db.IntField()
	email = db.StringField()
	fav_restaurant = db.StringField()
	location = db.StringField()
	reg_date = db.StringField()