I've been meaning to do a saddle swap between my bikes for awhile. I've been using a Specialized Romin saddle on my Bianchi road bike, which I love. But it's a little long (270mm) and quite stiff, so I wanted to switch it over to my Specialized TT bike, which still has the standard factory saddle on it. I figure that since my position on the saddle is more forward in the aero position, the extra length would be a benefit. On the Bianchi, I wanted a saddle with more padding. So I did some research and decided to go with the Fizik Aliante K:ium.
The Aliante is the same width as the Romin - 142mm (The Romin is actually 143mm), but it's also a little shorter (265mm). The reason I like the Romin so much is because the width is perfect for me and the cut out down the center-line makes a huge difference in terms of comfort and pressure on my backside. Instead of a cut out, the Fizik has a 4 or 5mm deep center channel. It is also quite a bit more plush, though not that much heavier - 238 grams to 208 grams for the Romin.
Fizik Aliante K:ium
I just finished installing it and will give it a whirl in the morning. The Fizik makes sense on paper (and felt good when I rode a mile or two around the neighborhood), but just in case, I wrapped electric tape around the rails so they don't get scratched up by the clamp. That way I can return it if I need to.
We shall see....