Looks pretty promising if this review is accurate:
https://www.ocinside.de/test/arctic_p12_slim_pwm_pst_d/5/
Same level of noise at 1356 rpm as regular P12 at 1056 rpm while being just 1 C worse.
Can’t say about that particular comparison. But you should use three A12x15 (or two A12x15 plus one A12x25 if possible) on EK SE 240 (or even better, TX240 because that is thinner
and more performant, and you can elevate it off the strut to create more breathing room for your fans) and that will be better than 2x A12x25 on HJ. HJ doesn’t allow you to fit the third fan unless you position the ports towards the rear end of the case.