I find it very comfortable to ride with the portion of the bars next to the stem at the same height as the top of the saddle. If the length of the higher stem is the same as the lower stem, the "reach" from the saddle to the bars decreases, due to both the height of the bars, and, when you raise the stem two inches, the bars move back about 1/2 inch closer to the saddle.
As I get older, and my back becomes less flexible, that shorter reach makes long rides much more enjoyable. I can ride three or four hours in comfort with a high bar position, compared with maybe an hour in the "boy racer" position.