Bob that is right..At the time..The TX802 is the better unit[naturally], but the TX81Z was handier..and it had a larger on board patch list[useable]...I used it with a bass[one voice] and a piano[7 voices], set up as a split on a single channel..
I purchased them both new, and after I sold them both, I actually bought used 81z's three more times..The market then was $75-$100 for the Z's...I sold my 802 for around $400...
And the z had the famous pseudo reverb..