i have all 4 zg screens in clear,heres my take on each of them
sport touring- bought one a few years ago,thought it would be nice for cold weather,this screen was a huge dissapointment,the buffiting was awful,there is a thick layer of dust on it somewhere
stock replacement-great optics and aeros,but your tuck better be good,if i didnt have a power adder,i would use this screen more,can't put my nose on the tripple,so to speak,this screen keeps you higher up,and back,making the bike more wheely prone on the bottle
double bubble-cuts a nice hole at speed and in general is a very nice screen,but again you can't climb up on it,without bashing your helmet into the screen,the more spray i started using the worse it got
drag cut-this is a cut back version of the double bubble,and what is on my bike right now,you can get as far forward and as low as possible,and the screen is not a limiting factor,a little more air then the db at speed but not bad at all,i like this screen alot