I dont think there is much difference, any card can get loud if the fan have to use high RPM. Its mainly a matter of the RPM and the RPM will go higher when the cooler is weak or wrong settings. Usualy, there is no need to cool down a GPU like mad, they can take lot of heat, much more than a CPU. Only should take care that the GPU wont exceed 100°, then all fine.
Just important to get a fan with auto fan adjust (not fixed fan). Sapphire surely is one of the leading manufacturer for Radeon cards so you cant truly make something wrong with. From my experience they have pretty good standart settings on the fan speed so its not always needed to make adjustments. The fan only goes max RPM when its close to 100° and thats important for not having the GPU to loud. In Idle mode as long as the fan (in that term theyr Vapor cooler) isnt exceeding 24%, the fan will stay pretty quiet.
Aswell important to know, those cards (and almost any nowadays) are blowing the air to almost any direction of the card, unlike cards (usualy reference design) who are having a clear out and input. Those cards are better in order to cool down the entire GPU and may cause lesser noise, however, about half of the heat will stay inside tower. So, the cooling performance from the PC system itself is aswell playing a role here, on how hot such a GPU will become. So its important to have some airflow inside case which is directly affecting the GPU in order to get even lesser heat, and therefore noise.
