My Genius 5s are very stiff. Probably stiffer than the Doms but the Doms get walked in which breaks down the soles. I've never heard rumors that Sidis soles aren't stiff and if you aren't seriously racing, how stiff do you need them?

I've got Look Keo carbon pedals that I love. I've used Looks for 20-some years and these are the best yet. Incredibly easy to click in. The Carbons have 2 bearings rather than one which should give them a longer life and are 20 grams lighter but the Sprint can be adjusted to a lighter release tension and get excellent reviews. Price difference of $80. The Sprints received Bicycling Magazines' Pedal of the Year designation.