Just as described in the product review, the FR-C Pro is a huge advancement of the FR line, which I have used for several years now. I always felt the perfect bib would be a combination of both the upper body of my FR and the lower body of my Assos Equipe.
Not any longer!
Compared to the Assos, the straps are far more comfortable and where the upper body meets the lower, I feel more secure with their firmness. Although the grippers feel more secure with the Assos, that's only because there is no cuff of cloth, which is prevalent on most bibs today.
The FR-C Pro shorts disappear, regardless of time on the bike, which usually averages 3-hours. By contrast to the regular Forma Red, the lycra is softer and the cuffs don't bind. In a word, they are the most comfortable shorts I have worn. And as an inducement to buy the FR-C Pro, it is priced a shade lower.