I got a V-Stream sport touring screen on Thursday. Swapped it in that night and rode ~700mi over the last three days.
The V-Stream is better. Nice clean air up to about 65mph, then it starts to get rumbly. It's not particularly loud until nearly triple digits mph. The bracket works well at keeping it from bouncing around, better than the Ermax which uses the Yamaha mounting plate. It has quite a bit less flex than the Ermax touring screen likely both because of its shape and the fact that it's a lot thicker.
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It's slightly taller than I prefer, I can't see over the top of it to see the road right in front of the tire, but the light smoke color is plenty clear enough.
I was worried that it would block so much air that I'd stifle on a hot day, but it got up to about 80F and there was enough air coming around onto my arms and through the mesh jacket that it wasn't a problem.
Works for me. Works really well for me, even.
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Yes, even though I didn't do anything like 700 miles (probably not even 70) it's clear that I prefer the Sport Touring over the Touring. It was a blustery day and I think over 60mph was when it started to get a bit noisy. If I dipped my head just an inch I was in clean air so for slabbing I'll probably bring the screen into the middle or top position.
Both V-streams are good and significantly better than stock any day of the week.