Got back from Prague and tested the two configurations. The butterfly worked great on the 40+ mile ride that was relatively flat, it claimed the hill just fine but on the single track decline I stopped several times to make changes but never could get comfortable with it. I even carried a couple of different stems. The MTB bar with end bars worked well on everything and I ended up putting it on my hybrid and put the Jones Bar back on the Fargo. I took the bike to Yellowstone for my last cc tour of the year.
I do have to add that I chatted with a number of riders in Prague and saw riders using all kind of handlebars. Choice was mainly determined by cost and not sex or nationality.