It is safe to say that you will receive the same high-level of service whether you are staying in a Four Seasons Hotel in San Francisco, Paris, Budapest or Hong Kong.
The Four Seasons brand is well-established. Both business and leisure travelers, who are looking for luxury accommodations, know what to expect when they check in to any Four Seasons Hotel or Resort anywhere in the world. The reason the Four Seasons has such a loyal following is because they deliver on the promise of their brand.
The hotel industry is comprised of many well-known brands as well as many unbranded properties. It is dangerous to draw any conclusions about whether you will have a more enjoyable stay if you choose a branded hotel or a family-run hotel, without a well-known brand, two blocks away.