I know it's anathema to many on here, but I actually agree with you that the slimmed suit jacket waist makes for a feminine looking profile. The bottom one falls nicely from your chest, without too much flair at the hips and ass. The top one... looks like a Hillary Clinton pant suit if you only look from the chest down - sorry.
The effect in question depends not, I think, on the waist alone but on the relative proportions between shoulder, waist, and hips.
Oh, also on camera angle and possible lens distortions ...