Sweep the Saints = division winner.
Splitting w/ the Saints would require the Saints to lose to either to the Rams or the Bucs for Carolina to win the Division. Assuming a split, Carolina could lose to the Jets (but not the Falcons) and still win the division if the Saints' loss is against the Bucs. If Saints loss is against Rams, then Carolina has to beat Jets/ Falcons.
Carolina only needs two wins to guarantee a WC spot so even if we get swept by the Saints beating Jets/Falcons gets us in.