It really depends on what else you're taking in to the bush.
My set up consists of a 12" Ontario Machete (soon to be replaced with a Fiddleback 12"), a Silky saw, and my EDC knife (Ontario rat 1).
I use my saw to bring down standing dead wood, and cut it down to log size.
Then I take my machete to baton the log in to smaller planks, as well as clearing camp, and other general chopping.
Lastly I use my folder for Whittling, cutting rope, and cooking tasks.
My buddy always bugs me about using a machete for battoning logs, and shows off how well his BK9 does at it. But every time we set out to chop, My machete always comes ahead weather I use it or he does.
My point is that the BK9 is an outstanding Battoning and general cutting knife, while at the same time being an impressive chopper for its length, however the machete does seem to out chop it due to its speed, and thin profile that allows it to sink deeper. Note that this does mean you need some time to learn how to "properly" hold a machete by using a pinch grip, and using the right angle to move the wood quicker.
While my machete doesn't baton as well as the BK9, "I" still prefer it due to the weight, and extra reach it provides while clearing camp or a path to find a new one.
Just my .02