Adex does not "block" estrogen receptors. One (adex) temporarily binds the aromatase enzyme so it temporarily cannot act upon upon anything in order to produce estrogen, but the effect is temporary. Aromasin "kills" the enzyme completely, so the effect is lasting upon that particular enzyme.
I dont know why everyone doesnt just use aromasin.
im not exactly sure what suicidal inhibitors mean but is aromasin really that much better than adex. ive only used adex but now i have adex and aromasin on hand and am debating on what to use for my next cycle.