They are all stress tested, the 4070 FE is 32 db at 69c, that's not bad... and people do think of the FE as a quiet GPU, it is, but its not 26 db.
40 db is not "loud" per-say, but it is a noise that is there.
I think Sapphire make particularly good coolers, that's nothing new, they always have, remember the Vapour-X range? back in the day they were known to be particularly good coolers, desired for the quality of those coolers.
The whole card, despite its lowest price range in AMD's line up, other than one junk ASRock card to be avoided, is well made, it feels and looks in your hand a quality thing, even has an array of thermal pads between the back of the PCB and the backplate, that's quite rare even among the most expensive cards.
If AMD, Sapphire can make these very high quality cards for as little as they cost why can't Nvidia's partners? A clue might be in the fact that Nvidia have just a few days ago allowed their partners to jack the retail price of their card's up by 10%, Nvidia are overcharging AIB's for these things and not leaving them any margins, this is why EVGA left...
Sapphire have always been my go to for AMD tbh, I had a 7950 Flex and a 7950 Vapor X which were fantastic.