according to Bill Claff's analysis:
IDK why you included the D500 in there. It is an action camera, not a landscape camera. Show an a6300 or even a D7200 if you want to include other APS-C.
Not sure why the D750 instead of the D810.
And we should note that Bills X-T dta is preliminary, he has few smapes and the hgiehr ISO data, which exhibits considrabel variation, should be considered tentative.
At nominal ISO 200 or higher the X-T2 may well be the class leader.
But,...
Well there's four 'but's.
- OP Is interested in landscape and citycsape. A lot of those are shot at base ISO and the rest at not many stops above base.
- The X-T2's base ISO is 200. Other leading APS-C cameras go to 100, and as a result, get about a stop more DR.
- FF dSLRs have a bigger sensor, and get a DR advantage ftom this, as well as the advantge they get from a lower base ISO.
- And finally, of course is the matter of Fuji's different method of ISO calibration, which tends to trail other maes by 1/2 to 2/3 stops. SO when you are shooting at ISO, 200 on Fuji, you might get the brightness of an ISO 320 shot on a Sony. For equally bright ashots, as opposed to nominally equal ISO shots, the Canikony cameras will have another fractional advantage.
So let me suggest that the following graph of Bill's data (which uses nominal iSOs, not measured ones) will be more relevant to OP's question:
At its base ISO, the D810 has more than 1.5 stops better DR than the X-T2. At their base ISOs, the Sony a7RII and Pentax K1 have nearly 1.5 stops better DR. Even the two year old APS-C D7200 has about a stop better DR than the X-T2 at their base ISOs.
At ISO 200, the X-T2 barely sneaks by the D7200, is about 1/2 stop behind the K-1, and about 1/3 stop behind the D810 and a7RII. That's phenominal performance for an APS-C sensor, but it is still behind.
When the X-T2's extra capacitance kicks in at IS 800 It surpasses the conventional sensors of the K-1 and D810., But that's at
nominal ISO 800, not measured, and how often do you find yourself shooting landscapes at ISO 800?