They are both 1 11/16" at the nut. But, as Backwoodsman points out, there are other matters such as scale - and string spacing, etc. My personal experience is that Martin doesn't always manage "space for fingers" well. I had a Martin 000-15CE for a while, also 1 11/16" at the nut. I'm a fingerpicker & loved everything about the guitar except the string spacing. Sold it and bought something friendlier to the fretting hand. I encourage you to play the instrument; see if it works for you.