Comparing different cameras, same scene

This tool is great in the link here but unfortunately it doesn't have any of landscapes - does anyone know of something similar online?

Imaging Resource's "Camera Comparometer" is better IMO, but still has no landscape comparisons, and for good reason:

With any natural scene, there is absolutely no way to keep the lighting constant and the subject exactly the same within any sensible time-frame. So who would be able to say if differences in image quality were due to the camera sensor, or to natural variations in the scene being captured?

 

The only way to compare cameras with any degree of scientific accuracy, consistency and repeatability is to use an artificial subject and artificial lighting.