I'm not saying better, worse, faster or slower. It is different, and it works.
Packing foam, a feather, a brass, lead or tungsten bead, UV glue and a diving bill molded over waxy glass or snipped from a parts container.
This one is ultra light, but the weight is as you like it.
A line exit hole low down on the bill dives aggressively, with a higher speed vibration
A line exit hole high on the bill dives less but swims and wobbles more widely and slowly.
You can choose to make them all light in weight, while using a big salt water swivel, maybe 12" inches up the line.
This is what happens when cold water fly tiers discover the joys of bigger fish in still water, or further down on a moving water river system.
Memory foam meant for high tech pillows works too. Memory foam is more open celled, so it holds onto odor more tenaciously.
The second fish usually comes a lot faster than the first.