Whichever one it is for chrome I have, it isn't ABP, it's a generic named Adblock. I don't use ABP due to the developer accepting money to whitelist google adverts.
AdBlock is significantly worst than ABP memory usage-wise (edit: on Chromium, I didn't benchmark elsewhere). I believe this is also the case CPU-wise from observing Task Manager during benchmarks.
(Admittedly the author is biased towards ABP. My biases: former Adblock user, former ABP user, current Adblock Edge and µblock user.)