Uhh... there are 2 different versions that you buy, and each comes as a set: loco and a tender...
There are 2 separate pages, one for each version... perhaps you only read the introductory page, and did not look at the version specific page?
From my site, 2 versions clearly indicated, overview clearly stated, and links to sub-pages clearly indicated.
Nothing ambiguous there I can see... even big black separator lines...
Aristo 2-8-0 C-16
(remember: links to sub-pages at the bottom of this page)
click to jump to the bottom
Overview - 2 versions
The original version of the C16 was from the purchase of Delton, with a few small changes from the sold by Delton version.
The new version had extensive drivetrain and electrical improvements. It appeared around 2007-2008
Apparently the profile of the rear of the loco was changed from the original Delton to accommodate the first Aristo drive train, and the later Aristo version has apparently restored this. (need pix)
Note that the part numbers are UNCHANGED between the old and new versions: 80100 and 80200 for the coal and wood tender versions. (dumb!)