The difference is just the outfitting. The creek outfitting is beefier and heavier.
1) Safer if you pin. Actually, the rocks may just disintegrate on impact when the Creeker comes in for a landing.
2) The Mamba Creeker will make you into more of a stud because you'll be carrying around 5 extra pounds of rock solid plastic. Add that to the water that will be in your boat, and you will be one buff dude that the ladies cannot resist.
1) Less likely to cause injuries when landing on Front Range no-boof beaters. Oh wait, you are from Boulder...