I am wearing the same shoes on both bikes. The bikes are pretty much set up exactly identical other than crank arm length & one being a triple.

I've got a 3rd road bike that I was going to sell... it's a double with 165 cranks, so I'll ride that to make sure it doesn't hurt my instep... and if that's the case, then I think it must be the q factor on the triple cranks... and I'll swap all the pieces off the double that I was going to sell on to my carbon frame and vice versa... and sell the triple....

It'll be a mild pain in my neck swapping all the pieces and I wouldn't have a triple anymore... I know theoretically I can get all the gears with a compact double, especially if I put a climbing casette on the back... but it's really nice how close you can get the gear spacing on a triple... You never really have to hunt for a comfortable gear.