mmenghe, I love my V frame guni, but I'm not sure if I'm the best person to give you a true comparison to other unis. My 36" uni is not just the only 36"er that I've ever ridden, it's also the only 36"er that I have actually laid eyes on. I've seen many pictures and videos of 36" unis but that's as close as I've come. Weird isn't it? That being said, the handlebars are farther out front than what you would get with a T7 and this allows me to get a better tuck when I'm going fast. I don't need to hold on to the handlebars when I'm riding, so I can have the same upright posture that I would have on a uni without handle bars. So overall I'd guess that the V frame increases my efficiency because it allows a broader range of postures depending on what my body feels most comfortable. I could easily envision handlebars that extended farther out front than mine already do. It would not be a stretch.
Hope that helps.