yes, i obviously cant talk for every single channa in the world, but the biggest out of the punctata is in the community with the delhezi. They are about the same size. My delhezi is very active and just swims into other fish including the punctata and it doesnt really show any reaction apart from swimming away and hiding. The only thing i have whitnessed i it eyeing up the red tailed botia but they are only about 2 inch and it doesnt even attempt to chase them. I would say you would be best giving it somewere to hide, atleast until it settled in as bichirs can be quite boisterous. If i thought for one minute it would harm any of my fish it wouldnt be in there but the bichir would be the last of my fish i would worry about the channa attacking. They can get to 12 inch, more likely about 10 which is smaller than any bichirs, the delhezi being one of the smallest maxing at about 12 inch. I would of thought the bad rep would come from people who put species like micropeltes in with a senegal and the bichir gets eaten and the person sits there wondering why!
If you are having second thoughts then just mabe think about it for a while then decide. All i can say is that from my experience they keep themselves to themselves, atleast with fish atleast 2/3 the size of the channa.
David