You're forgetting Oman.
IIRC, before the Revolutions, it went something like Oman -> Bahrain -> Qatar -> Kuwait -> UAE -> Saudi Arabia, with a BIG difference between the last two and the rest. Of course, Bahrain is now near the bottom, being a Saudi puppet in all but name now.
The biggest differences would be al-Jazeera might not exist, and Bahrain's restlessness would probably be dealt like the Saudis do in al-Hasa.
You might be confusing reform and oppresive regimes. Oman has had very little political reform, and the Sultan is still an absolute monarch. However, Oman may be the worlds only example of a benevolent dictatorship.
Bahrain has a partially elected assembly, but half of that is filled with government appointed members. I think Kuwaits version is fully elected, but im not that sure.
Qatar, again, doesn't have much in the way of the kings power, but with a GDP per capita of about $80,000, the citizens of Qatar arn't dissatisfied. Poorer expatriat workers may be, but they are more concerned with feeding their families back home then revolution. This goes for most of the poor expatriats in the Gulf actually.
And of course, Saudi Arabia is Saudi Arabia. A place so bad, many of my female family members refuse to go see family there, even though its only a 1 hour drive. Plus all the other problems you find all over the Gulf. With less of the benefits too.