I tried a K but didn't care for the lower mids - seemed lacking to me. I've copped an E but haven't gotten around to trying it yet. We'll see ...
P.S. The problem with trying just one vintage speaker example of any model is the sample size is too small to be certain if any shortcomings you perceive are endemic to the model or it's the one example you have is imperfect. This is why, for many (if not most) reviews of vintage speakers, you have to be careful to take what you read with a grain of salt and this includes my own assessment of the K I had.
When we Go to Heaven, will Jer ask whether we were the perfect Jerry ... or whether we were the perfect us?
What does Jerry tone mean to you? Copying Jerry slavishly? Honoring Jer's music no particular way but our own?
We're each of us unique. And also the same. Can we open our hearts and minds to both?