I just wanted to add that, despite my long ruminations on the ways in which the Ricoh is more complex (and they really DID help me clarify my thinking on these two cameras), the only place this really affects me a LOT in day to day shooting regards exposure compensation, which I tend to use quite a bit while street shooting. And the funny thing here, the irony really, is that the Nikon treats exposure compensation the way Ricoh DID treat the snap focus adjustment up to the GRD3, did NOT on the GRD4, and then after many users (me included) screamed about it, DO yet again on the GR. You press and hold one button while turning the primary adjustment dial to the setting you want, then when you release the button, the level is set. Ricoh users LOVED this method of changing snap distance quickly and howled when the GRD required button presses, followed by scrolling, followed by yet ANOTHER button press to lock in the setting (otherwise, it would stay active and take over the cameras other controls). Ricoh listened, restored the press/hold, adjust, release method on the GR and all is well. Which is how Nikon does exposure comp, ISO and a few other things in their interface, which is much criticized by a number of Ricoh folks.And the way these choices' pop up lists function can't be changed. If you pull up the focus or metering sub-menu, once you make a selection, you either lock down your selection by hitting the OK button, or you leave it "active", so you can take a few shots and then change it again without having to call it up again. Which can be convenient. But whenever you leave one of these sub-menus open, ALL of the controls now control THAT function. With most such controls, hitting the OK button is a no brainer for me. But with the exposure comp adjustment it's not. I don't like to hit the OK button every time I change the exposure comp, but if I don't, suddenly I can't change anything else because other controls either now also control exposure comp or are disabled. Again, not a bad thing - this can be very flexible - but it can also cause confusion and inadvertent adjustments. At the very least, it's more to think about.
Ricoh, OTOH, does exposure comp the way they did snap distance on the GRD4 and had the masses upset - you press the + and - rocker switch and its INSTANTLY armed and adjusting the value - this is great. BUT, then it stays active and takes over all other controls until you hit the OK button. Since I use this adjustment a LOT, I either have to get in the habit of pushing the OK button after each change (a small but real pain in the butt) or just leave it active but them remember its active and has taken over all of the camera's other controls, and remember to hit the OK button before I try to adjust something ELSE... In my past Ricohs, I got used to this, never really thought of it as a negative or a handicap, but I did trip on it from time to time. So I'm sure it won't be a make or break factor in deciding between these cameras. But it is something I've become aware I don't particularly like. The funny thing is, so many cameras do it in ways I like MORE. The Fuji cams and RX1, with their dedicated external exposure comp dials are best, followed by the OMD (and it looks like the new Pen model) which has dual adjustment dials, one of which is always fully armed for exposure comp). The old EP1, 2, and 3 essentially did the same thing, with two rotary controls, one of which could always be armed for exposure compensation. The Ricoh gives you instant access to this control, but it makes you think about it a little harder than these others. And the Nikon isn't quite as good either, requiring a button hold while you turn the wheel.
Don't mind me - I'm just thinking out loud about MY PERFECT CAMERA again. And, despite these two wonderful entries in the small 28mm compact segment, my perfect camera STILL doesn't exist! Curses, curses, curses...