I've tried both of them. Big problem I have is that I'm 6' 4" and with crash helmet on add a couple more inches on that.
Standard screen may as well not be there. An MRA vario that I tried (and is now sitting on a shelf in the garage, did nothing at all. I just couldn't get it to work no matter what I tried. Tried some 'Tobinators', nicely crafted but they didn't work either. The Wunderlich screen I have just now seems to work in a fashion although I still get a fair amount of buffetting. I dont want to fit a giknackerous screen (or at least not any bigger than the Wunderlich) so I guess I'll just have to put up with it unless anyone can offer any further advice?
Cheers.