I much prefer HiFi+, to either of the two you mentioned. (And yeah, I know, TAS bought HiFI+.)
If I had to choose, I'd say I prefer The Absolute Sound to Stereophile. They seem more professional, (slightly anyway), and for the two reasons that Ncarv pointed out. Neither is particularly good. And, IMHO, Stereophile seems to have turned into this generations Stereo Review. (And that is most definitely NOT a good thing!). Back in the late '80s and early '90s, I used to subscribe to Stereophile, and they seemed much, much better, back when Holt was in charge, (or at least involved).
HiFi+ has Roy Gregory, who I much prefer to any of the writers at Stereophile, especially Fremer or Dudley, who really annoy me.
My two cents worth.
PS And, unlike Ncarv, I'd rather have the 80 cents a month in my pocket, which should tell you just how far Stereophile has sunk in my opinion. (Hey, that means I get to buy one more used CD a year.)