I was in the bike shop for abot two hours the other night trying on those exact shimano shoes and trying to decide between those and the Sidi Genius 4's. In the end, I chose the Sidi's. Both fit nicely, but the Sidi's were a little nicer and the lorica was a good feel. Also, what really sold me on the Sidi's was the buckle closure. It's so nice to be able to adjust it so easily while on the bike.. you just reach down and either push your bottom button to loosen one notch or pull the little lever to tighten them. I love that. The all-velcro on the Shimano's made them lose out. They were a nice shoe, however; but for the extra $40, I'd gladly buy the Sidi's.