Be easier to speculate with your month/year of manufacture and your actual front and rear brake PR codes. The month/year and the PR codes (1K_, 1L_, 2E_) would be on your vehicle information sticker; should be in the maintenance booklet.
In general, the RS5 330x22 rear and S5 330x22 rear use the same pads, unless you have the 1KJ S5 rears; they use a different pad part number (I presume a different pad material). Note, the rear pads part number changed from B9.0 to B9.5. The transition date was Nov 25 '19 for A5/S5 and Feb 10 '20 for RS5. So could be the references you are referring to are talking about that concern.
The same for the 375x36 fronts (standard on RS, optional on S). RS5 and S5 are the same, unless you have RS5 front PR 1LM or 1LX. Those codes use a different pad part number. Again, I presume a different pad material. Audi has never clarified anything regarding the different pad options they have been presenting for 12 years now. But neither of the 375x36 front pad part numbers are the same as the two 350x36 front pad part numbers (again, two, who knows why 1ZK is different pads from all the other 350x36 PR codes).
I'd be happier if third-parties documented the equivalent OE part number rather than bothering to try and say what vehicles said OE part number applies to. And I have to take issue with a company that can't even properly document what they are trying to sell. ebcbrakes.com shows no hits for B9 S5 or RS5 years, and searching for DP32277C returns "no results were found". Their ebcbrakesdirect.com is not any better. What incompetence.
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