Hi Rumtea, I have experience with the Strida leather saddle. I have used one for 3 years. For me the extra width at the back of the saddle compared to the standard Strida saddle is what provides the greater comfort. I think this is because of the upright body position when you ride a Strida. The quality of the Strida leather saddle is very good. I have no experience with a Brooks saddle for a comparison.
cheers, Bill