Hmm, depends.
My lecturer noted its easier for marketing people to get a job if
they have diploma than having a degree.
Diploma in marketing is sufficient, since a lot depends on
applications rather than knowledge or theory. And usually hiring a
degree holder require higher salary (by virtue of his educational
qualification) generally.
Seriously, a good boss will hire people who can perform, rather
than someone who just a have a paper qualification. This is has
been said many a times, but all bosses are profit driven, and there
is no reason why he should not get performers. If there is still a
trend on relying on purely paper qualifications, well, the
implications for Singapore business are worrying.
Just my dua sens. 
