First off—the yarn is wrong—and quite obviously, the cuff and leg portion of the sock is significantly shorter.
Yeah, well, since I am making these socks from left over bits –partial skeins of Kroy in solid red, and plain white, and these light brown (flax) –most of the flax yarn is left over from a previous pair of similar socks (one of my early pairs) –when I started in earnest to knit socks. (circa 1994)
Previous to that, a pair was never quite a pair—by that I mean a pair was almost never a matching pair, and while sock 1 was whipped out in NY minute, sock 2 often didn't appear for a year or two!
This version (as you can see above) has two small triangular wings—part 1 of a small side gussets to provide ease for the heel and instep fit. What you don't see is the row of provisional yarn for the heel placement—making them not quite afterthought heels. There will be a part 2 to the gusset as I decrease on the foot portion of the sock.
This style of gusset doesn't actually make the heel and bigger (deeper) but it does make the socks fit so much better--I am practiced at picking up an extra stitch or 3—when I pick up the heels, its amazing how just 3 or 4 extra rows in add to the fit, too.