"On par" is all a matter of opinion in the way that I think you mean. Mobil and AAA both have minimum requirements for their Star/Diamond ratings. That said, based only on the accommodation types and services advertised a property will have the potential for a particular rating.... then the inspector shows up and based on the level of service he receives makes or breaks the rating.

The Skirvin does not offer any services that the Shearton and Renaissance do not... at least not insomuch as it would put them above and beyond.

The Skirvin website says they have shoe shine service... negative. None of the downtown hotels do. If the inspector wanted his shoes shined....BAM.... they are farther from that star.

I agree that the Skirvin is more attractive, grand, and appealing... but it doesn't mean that the Sheraton can't score higher "by far" on rating systems with specific requirements.

5 Star (specifying Mobil) require crazy things like original artwork in each room.... 4 requires it too... but they can be prints. If the property can't meet that requirement, they have to make up for it in another area. It's a "we require all items from column C, at least 8 from column B, and 3 from column A" sort of thing.