Ive never really used a computer generated picks before, and I was wondereing what's the difference between the computer generated picks that look like deformed snakes/wavy shapes

And the picks that are flat on the bottom, but are all different heights on top. http://www.lockpicks.com/index.asp?PageAction=VIEWPROD&ProdID=263
I was mainly wondering which type you find most effective, and also how you use each type

Thanks
Unbreakable