Caps Jantzen Standard--z vs ClarityCap ESA

what jantzen you compared it ?
standard or superior ?

Standard. So update here - I just reinstalled the 10UF Jantzen Superior in a Bottlehead Kaiju and was reminded of the veil and rounded corners. I added another film cap in parallel to bypass, Audyn Silver 0.1UF, and the veil was gone and dynamics improved. It sounds great, so maybe do the same. Adding a film cap at 1/100th of the value in parallel enables the speed to return. 

thank you

Within the ClarityCap range, CSA succeeds ESA-- improved with the addition of copper ends, as compared to ESA's tin/zinc end spray.  The performance is improved at a modest increase in cost.

Charcroft/ClarityCap OEM Sales 

Another vote for whatever humblehifi says. He has great ears and mine hear exactly what he writes.