I have a Giant Defy. I have been riding on a Selle Italia Flite Titanium 1990. It's a great saddle but has some rough miles and is looking worn out. So I picked up a Fizik Antares which appeared to me to have similar dimensions and curve. After riding the new saddle it is far less comfortable then the old saddle. Just wondering if they take time to break in or if I should just put on my old worn out looking saddle. Thanks.