Comparing a Model A with transverse leaf springs and a "Cobra" with them is apples and oranges. The Model A is 1920s tech while the Cobra is early 50's
Honestly my Superformance 289 is a pretty decent ride and a fun "tossable" car. You can get a Kirkham "Hybrid" 289 with coil overs and the street roadster body. The Superformance (and therefor the Shelby 289s as they are the same car) have a revised frame, i.e. stiffer and spring package to improve ride and handling.