I was just using ABP on Firefox and just noticed a slightly big difference with Maxthon's ABP.
I was browsing video streaming sites and noticed a mirror that doesn't play unless you turn off the adblock (both Firefox and Maxthon). I had the mirrors link whitelisted with wildcards (*.domain.*), It worked on firefox's but wildcards aren't allowed on Maxthon's whitelist. The video player is embedded so it can easily be whitelisted with wildcards but it's hard on Maxthon(can't do it).
Additionally, you can block elements easily on firefox while you need to type it manually on Maxthon.
The only advantage I see on Maxthon's ABP is the custom filter which is not on Firefox's, aside from that, those in firefox are probably better.