It's not just the aspect ratio that affects the 'chunky' look, the make plays a part too. Most of the Falkens I've seen 'look' chunky in all sizes but the Pirelli P-Zero's I had 'looked' a lower profile than they were, in fact they almost looked stretched when they weren't, if that makes sense?
In essence, don't just look at the sizes, the brand also makes a difference imo