Go with which fits better. I got my walnut strands from the nordy anniv sale. i wear 9EEE. they don't look clunky, fat, or wide at all. no photos right now, but will post if i take some later. so, yes, it's a stupid thing to worry about. the strands are a ridiculously good-looking shoe (better-looking than the somewhat-comparable half-brogues from alden, which i saw in person and was not impressed with), and it still looks great even in 9EEE. plus, nobody looking at your shoes will be seeing a 9.5e side-by-side with a 9eee, and even if they were, they'd have to be looking for a difference to notice one.