Not completely on point, but interesting. A Westfield (black) and an Exocet frame side by side. There's a significant weight difference - 135 vs 191, if memory is accurate. The Exocet is stiffer but bigger. They both use the same basic powertrain, and the Exocet uses the Miata subframes while the Westfield uses the same uprights but on their own arms and geometry.
Very different approaches here.