Which is better - 90 octane no ethanol or 93 octane 10% ethanol

i solved the methanol trouble by useing Marvel Mystery Oil. 4 oz in 10 gal of gas. and an other way to get the MMO in is to check this product out. WWW.ampcolubes.com its is like the old organal Marvel Mystery oil top oiler. with the MMO my engine seams to start very fast.