If you cannot see even a vague similarity between the two, you are right, there is no use in discussing this intelligently with you. Are not both masterpieces? Are not both public places?
You have, as it seems usual, missed the entire point of Rob C's comment, or chosen to miss the point.
Why oh why do you persist in claiming this is a class thing or snobbery, its opinions and preferences nothing else. Stop trying to make it into anything else because its not.
In one of your posts you say "Others are trying to tell me how I should enjoy viewing the Mona Lisa or some other masterpiece. I reject that. That they consider their approach the only right approach is snobbery, and nothing else." and yet your trying to say your way is right and your opinion is what everyone else should follow and put up with.
In another you say "The insult is to tell me I'm not worthy of viewing a masterpiece unless I bow on somber knees. Arrogance and snobbery - that is what the article is all about." and again your trying to say your way is right and everyone else's opinion is wrong.
Arrogance ? I think you need to look in the mirror when it comes to that.
This is just about the opinions of people as to how they would prefer to enjoy a museum, they differ. I can accept your are different to mine and the debate has not changed yours or mine and that's okay, I can live with that. Can you?