Yes Jake a coffin tang is weaker but still beyond the efforts of a mere mortal so it is a moot point. Remember the test video of a stick tang knife!
There is nothing wrong with a full tang, well maybe some stuff but it is not a bad knife, however, I know you already have an extensive collection of full tang knifes so why not try a coffin tang. What have you got to lose?
Bruce, If Allan has started you knife then I would think a full tang will take longer as the blade started for you will not do now. Of course it means some lucky divel will get theirs a little earlier.
And before I am accused of not following my own advice I have said I am about to get two BushmanUk full tang knifes so I am trying both types.