I don't have a base to compare the 210mm flywheel to. I can say that the AAZ responds well to the 210mm flywheel without any adverse effects that I can tell. I would stay away from LIGHTENED flywheels especially.
diesels come with heavy wheels factory. much more heavy than the gassers. (210mm atleast)
the diesel FW is like 17 pounds, while the gasser unit is 12.. i weighed them once upon a time.. fairly large difference.
so, to a diesel, even a stock gasser wheel is light..
and a lightened flywheel is just too light.. makes them vibrate much worse at idle as well..
heavy wheels are there to help smooth out the rough nature of these engines..