Hello,
This time I did check twice or three times, went over to another computer with a spare disk, etc.
The compare was simple cmp, USB-to-.iso. I looked at the /usr/sbin/debootstrap on the installed disk. Since "||" was larger than ")" I thought it could not be a transmission error.
Remember, the last email sent me back (to a laptop I had turned off) where I found that the DLBD .iso files were smaller than the ones pulled off the USB sticks.
I built the 25GB BD set using the same files scanned as to build the DLBD files. That worked fine after I used xfburn and not brasero.
On to rebuild and hopefully I was calling "Wolf!" again...