Today going head-to-head we have a v-neck cardigan and a scoop neck Henley sweater:
Both of these sweaters are worked at the same gauge, 18 stitches over 4". I generally prefer to use a lighter weight yarn for sweaters, because the thicker the yarn, the thicker the body underneath appears to be. The brown sweater is 100% wool, while the gray is 48% cotton, 46% modal and 6% silk. If you look at the bottom of the sleeve, I think it's apparent how much more drape the gray sweater has. Generally that is a good thing, because draped fabric will tend to reveal more of the body underneath and have a slimmer line.
However . . . more prominent here for me are the design lines. The brown cardi had dramatic buttons which continue the strong vertical line begun at the v-neck. The gray pullover has a cute little vertical line of buttons, but the vast majority of the body of the sweater is boring expanse of stockinette stitch.
So the winner is: brown cardi!