Wedding Cake vs Pulut Kuning
Here's my two cents:

CAKE
I like cakes. But I hate wedding cakes. They are pretty but they're just what they are, a display. Simply a dummy, for show. Not edible, not for tasting. Most of the wedding cakes that I ate are tasteless. After the cake-cutting ceremony, most people are already going back so there'll be a huge leftover of that tasteless cake. Who's gonna eat all the fondant, icing, creams and the hard cake? Plus, they are overpriced. A 2-tier cake is priced at RM300?! That's insane! *ok, I'm a cheapskate. ;p * But the best part is, they can be made custom according to your liking. You have choices of design, color, flavor and yes, tier.

PULUT KUNING
They're traditional, suit Malay weddings well and are a favourite among the elders. My mom's a huge fan of pulut kuning. Me myself would rather eat pulut kuning rather than a slice of wedding cake. Plus, you can put any type of gravy to your liking. Mutton, beef or chicken curry. They are all tasty. People won't think twice to pack it home, compared to cakes. But unlike cakes, you can't change the color to suit your wedding theme. Just imagine if your wedding's theme color is red and you wanted the pulut to be in that color as well? Horror! I pun takut nak makan pulut kaler merah. Bukan pulut kuning dah namanya tu.
my vote goes to
PULUT KUNING! (obviously, duh!)
Let's see what Johan gotta say on this then.
