Actually there has been significant discussion here about comparisons between the two models, but it has been several months ago since the topic was last raises.....therefore, it isn't readily visible unless you expand your "preferences" to a longer period of time.
I don't own either of the listed models....my spinner is an older Hy-Tek model that is no longer available. But, I can tell you that the Donkee spinners have caught a lot of attention due to excessive vibration. A couple of Donkee users have complained significantly about the Donkee model vibrating to the point that they were barely useable. I don't recall anyone complaining about vibration with the Vertex model.
Of course, any spinner can vibrate somewhat when the ball is in such a position that the internal weightblock makes the ball unstable......so some vibration can be expected at certain times with a ball spinner.
Hopefully some of the spinner owners will chime in here to give you the full lowdown on both models. My initial guess is that the Vertex spinner will probably top the desirable list, but I'm just speculating here too.
