Which type of erectile dysfunction is worse? ed due to arterial insufficiency or ed due to venous leak?

Eh...: In the old days, the answer would be simple: arterial insufficiency, because there was no meaningful way to increase flow without penile injections, but leak could often be addressed with a penile ring. Now, both are fairly readily treatable by a competent urologist. See one to determine the causes and to what extent the various solutions can help.