You're seriously telling me you can't see the resemblance? Aside from the weird gorilla arms and the wasp waist they're very similar. All the Roughneck is missing is a boxy cowl over its cockpit instead of the roll cage.
All the humanoid 'Mechs in MWO look so much alike to me that I have trouble with target identification without the help of the HUD. I didn't have that problem with previous MW games despite the vastly inferior graphics fidelity (MW2 has basically a bunch of cubes stuck together like early Plog art, but you can still tell what's what), so clearly the problem is in the designs for MWO.
You know what? I'm going to challenge you on this.
First off-the
Shadowhawk image you chose is the first result on Google Images. And it's flipped, thus inaccurate. The main gun is on the right side, when it's supposed to be on the left.
And yes-the waist and arms of the
Shadow Hawk and
Roughneck are different, obviously so.
Image One - Cockpit Assembly. The
Shadow Hawk's cockpit is upright, surrounded by plating on all four sides, and is box-shaped for the most part-with a missile rack to the right and an antennae on top, it sticks out from the chest despite the lack of a neck. This is consistent with original artwork, where-while having a neck-the cockpit was recessed into the head. Meanwhile, the
Roughneck, while also lacking a neck, has a much more exposed cockpit, much closer to the
Huntsman in location/position, but it juts out at the bottom. A bar is located above it mounting the laser, the bottom is exposed and juts, the glass is reinforced. Although, it also has an antennae-a much larger one at a 45 degree angle from the top of the head. Two large metal struts run from either side of the head providing a "Collar" not much unlike the
Executioner, but less pronounced and at a parallel angle.
Image Two - Chest. The chest/torso of the
Shadow Hawk is smooth, with a recessed missile rack on the right side for the LRM-5, a small bump in the center, and two vents on the underside of the chest. The chest of the
Roughneck, on the other hand, has a large pit down the center thanks to the struts to the side of the cockpit. The missile rack on the left side is on the shoulder, and two beam mounts are on the left "breast". Meanwhile, the right shoulder is dominated by a gun in a mounting at the same height. This is a reversal of the
Shadow Hawk's gun position, true, but sizewise the gun is much larger and more obnoxious.
Image Three - The legs. Oh my. The
Shadow Hawk's leg has a massive heel, a thick front, and a humanoid-biped design. Simple and to the point, with chunkiness in spades. While the
Roughneck's leg is similarly chunky, it is digitigrade in design, lacking a "Heel" in the vein of the
Shadow Hawk. This is probably-aside from the lumbering arms-the most glaring portion of the 'mech.
Image Four - Groin.I don't want to talk about this one much due to the inherent awkwardness of the image, but the
Shadow Hawk's groin is larger, being taller than the Roughneck's wider hips.