In my experience living in israel, debka is more accurate on military matters than HaEretz.
Debka is alleged by some to be inaccurate and I believe they are a bit bombastic and over the top.
I use Debka as notice to check other media sources for the accuracy of what they publish.
Some of what they publish is disinformation (on behalf of the Mossad I guess) to confuse enemies and this is where the inaccuracy of their information does come in at times.
“Haaretz” is owned by the New York Times and they have a bias, but again if its military activity they are writing about I trust them to confirm accuracy of the military activity per se, after that watch out for the bias.