I don't have a clue what all that stuff about width sizing for shoes it but a lot of guys with wider feet complain about how narrow inov8 shoes are.
I find them a perfect fit but I think I have quite narrow feet too. If you can try some on I would definitely recommend them! I have a pair of f-lite 195's, some mudroc 295's and bare-x lite 150's. For dry, not to rocky terrain I love the f-lites and for when it rains in the UK (quite often) or when i'm running on snow I go for the mudrocs because of the more WR upper and the awesome tread. The other pair are a road shoe.
Give them a try, even if you've never tried minimalist shoes before!