Which Inov-8 shoe?

Have you tried their website? The products page says this:
“All of our shoes have a naming system where the name is unique to the sole design followed by a number which is the weight of an average UK size 8 shoe.”

Also on that page at the end of the list of shoes are two tables of suggested uses for each shoe.

Ryan, see this chart on their website:

Inov-8 Terrain Matrix

I’ve used most of their shoes and think the matrix is pretty accurate.

The best all-round hiking shoe for long distances is probably the Roclite 315 and Terroc 330. For trail hiking with lower daily mileages, the Roclite 285 and F-lite 300 are good choices.

If you’re going off trail with long mileages, the O-330 is a winner. Lower mileages and you can get away with something like the Mudroc 290.

If your feet are exceptionally fit you can look at the lighter models.

I have wide front part of foot but narrow heels – can’t wear a lot of brands because of heel slippage

have done well with Brooks because their heel cup is pretty deep & snug