Neither of those. If it's not 100% wool (or maybe 100% linen if you live someplace really hot and don't mind having it pressed every time you wear it), there's nothing "better" or even "good" about its quality. 50% wool and 50% polyester will not only look terrible and be hot as a motherfvcker, but it will also pill. And as for 65% polyester and 35% viscose, there just aren't words for the travesty, a suit that will turn shiny and make you look like a used car salesman striving to look like Eurotrash. Both of those suits aren't even worth the less than $100 they probably cost, and if they cost more, then if you buy either of those, you're not only buying a crap suit, you're getting ripped off buying a crap suit.