It's a Kymco Bro!
These are monotube, robot welded, chromoly frames using springs for the 3-4 inches of suspension travel they have. Out of approx. 100 pounds of metal perhaps 5 pounds is steel. The rest is cast aluminium. A common sling shot, and ball bearing is enough to put your bike in the shop.
Your question should be which is better for surfing big waves, a mountain bike, or a dvd player.
Everything on your Kymco will fall off or break. (riding off road)
Before everyone chimes in about the grassy knowl, or the rolling hills they ride 300 miles each way to commute to the coal mines everyday... I'm talking about trying to keep up with your friends YZ-80 thru the woods or thrashing it around on the local BMX track.