[susam]

> Which one is more readable?

Both are equally readable to me.

Now, granted 128 1 28 28 can be difficult to understand without documentation but that is not due to Lisp's fully parenthesized prefix notation. The Clojure code would also look equally readable if it had used keyword arguments.

Are you sure you are not confounding familiarity with readability? With Lisp, after a while, the parentheses become invisible to the programmer.