I'm not sure how amperage affects the clipping; everything I've read about diodes clipping is about
forward-voltage.
Taken from a random web-search:
A "volt" is a unit of electric potential, also known as electromotive force, and represents "the potential difference between two points of a conducting wire carrying a constant current of 1 ampere.
Way-back-when I read that diffused had a different FV than clear, but that was debunked here:
Preemptively let me say I think I already know the answer, because every diode-based distortion pedal I own, or build photo I see here/elsewhere uses the DIFFUSE ones. ...BUT... As I understand it, the diffuse LEDs are all just white LEDs with colored plastic housings. So if that’s the case...
forum.pedalpcb.com