I import a w001000.adf raster image (WGS 84) in QGIS (the project is also in WGS 84). I save as geotiff (.tif) with the same CRS, WGS 84, same resolution. I expected the images to superimpose perfectly. When I zoom in and use the identify features tool: no problem, pixels have the same value. Everything superimposes perfectly.
When I zoom out, I see a shift in the image and the identify features tool does not have the same values.