There is a similarity I'll grant you that (they both have that '90s Euro smooth coupe "chasing the 3 series" thing going) but I wouldn't go as far as saying that they're twins. To my eyes there's something about the Goat that still speaks muscle . . . not a hint of it in the Volvo.
Oh, don't worry -- I'm not implying that they're twins under the skin! It's just that the overall body proportions, roofline, and especially the window behind the B-pillar look very similar to me. But no one could mistake that V8 growl for the, uhhh, :confused whatever you call the sound a turbo five-cylinder makes.