The matter of effectiveness regarding the intent of the low angle (comparison) is a bit skewed by the fact that the image on the right is also a larger scale / mass in the image. The size difference is capable of conveying more power. If the two images were of equal mass (yet different angle of perspective) we could better attribute / not attribute a sense of power to the angle (or not).
As to the term "regal" ... IDK, if a low perspective conveys that for or not. I've never associated it with being more "regal". Others may think so, but not so much for me.
The more I look at these the more that something just seems "off" about them. Having trouble placing if it is a different focal length, closer subject distance, the color difference, the scale / mass diff, resizing, or even if the left photo is shot with a slight downward angle (i.e. your eye level is higher than the subject, etc.). Sorry to be in the dissenting camp, but something just isn't hitting me with these the same way it is for you. I reckon it goes that way, sometimes.
