there is nothing wrong with the weights that are made for the malossi; it's just that they come with only one set of weights, and the specific kits available here are weighed for tuned out engines. Malossi weights are not readily available, but any 13x16 weights you can get at scooter shops work (polini, leovince, olympia, etc.).
The polini is cheaper and comes with two sets of weights so you can mix and match to many options.
You can get the same low and mid with the 6 roller as with the eight if you lighten up the weights. It's all about the weights.