I also read em all. I dont think any one mag's reviews are superior to the other. That depends on WHO reviews and WHAT games they review. I've found (in my opinion) spot on reviews and loads of crap reviews (based on my experience with said games) in all three mags.
Superficial observations:
Computer Gaming: a little too full of themselves; take the serious gaming and reporting thing a little too far. Always putting down the other mags for their juvenile antics. There is an element of truth to that assertion, but building your mag up by putting others down is in itself juvenile. And its just a freakin hobby folks. They are not writing for the American Medical Assc. That said. A good mag overall,though my least favorite; I dont know why.
PC Gamer: a wee bit juvenile. The Vede grates. Chiaki could lose a few pounds. My favorite mag.
Computer Gaming World: also a wee bit juvy, but less so than PC. Like Jeff Green. Sentimental fav as its the first mag I started reading when I switched from console to PC many years ago.
Now that I've posted my thoughts I cant help but think, who cares? Time to go play some games.