I wouldn't take the results in this thread as an endorsement of one wing over the other. The STi wing is a relatively recent development in the life of the Kitfox line, so there are a lot more of the standard wing out there flying.
What Eric said. I am a STi with ground adjustable but the two wings are really meant for two different jobs; one to fly slow and one to provide good mid-range performance.
Gary
Gary (Geek) Phenning
Leavenworth (Not the Prison), WA
Kitfox STi N68SG