I like the slight upturn at the tail end of the saddle, which gives something to kind of push back against. Unfortunately I was thinking I'd save some weight going from the standard Romin to the Prologo Scratch Nack. I opted for the "hard black" model with carbon rails, which was advertised at 165 grams, but actually weighed in at 206 grams, so I really only managed to save 20 grams in the switch that cost $150...
That's a massively overweight one! I have both the HWD and the Nack model. My HWD's weigh in about 205g range but my Nack comes in at 178g.
Came from a long line of Selle Italia saddles, the classic Flite, SLK, SLC, SLR, Flite Kit Carbonio Flow (in almost 20years of riding) but never got completely comfortable on them. Tried the Scratch Nack as I liked a friend's Fizik Aliante (but not the overall durability), as it was a very similar construction. Turns out its both lighter and better built ( but also more expensive). First saddle that I can completely not think about for those multi-hour rides.