For all those mentioned, yep a true fitting – get whatever you take in a normal shoe. Only ones which are a bit different I’ve tried are the PKs which come up 1/2 a size small (at least they did – mine are some of the very first ones of these, and I suspect sizing may have been brought into line).
Despite having huge heel spurs which give me a problem in any shoes (played canoe polo at a high level for many years with bare feet against a composite hull), the only Inov-8s I’ve had an issue with are Mudrocs – everything else has been fine, or if anything more comfy than other shoes. AFAIK it’s Mudrocs which most people have had issues with as the last seems to be slightly different – Mudclaws are vastly better.