Review (5/5): This may be more expensive, but holy hell is it sooooo much better than the 'purple' brand.
Not to totally knock the 'purple' brand, but this stuff just doesn't chap my hind. It's a more think cream and stays put in the chamois much longer than the other product. I still use the other product for around my knees when I put the warmers on, but when it comes to crotch-science, I go with this Assos.
Note - I'm 6'4", 250 lbs and love to rode ride and climb. I don't know if the effects of this would be different for you 130lb guys.