Hey Blair.....
Johnny's cards are , you are right, either "color" shifts or "drunken registers"....stahl and wagner are more "drunken registers", the bradley is a "color shift".....BUT/where as the teney has a "slight ghost"(hairline to the right of the profile.......Johnny techically has a "SLIGHT TENNEY GHOST"
drunken registers are more common than true ghosts....
some definitions:
The Tenney is also a color shift, but if you look at the hairline/profile projecting to the right= it also has a "slight ghost image"...............not as pronounced as most "ghost images", but one nonetheless.....
ghost images usually reflect the player's profile, either shown the subject on the existing card, or the player next to be printed either to the left or right of the subject matter......can either BE that player or ANOTHER player....
The real cool ghosts, the "dramatic ones" are totally diferent players super imposed (THESE ARE USUALLY SCRAP BTW) and extremely rare, and EXTREMELY EXPENSIVE!!

(jamie blundel's fergie/my bender/lake....rob's downey) ect....they are the pinnacle of "ghosts" those if you want to buy, u might have to finance those!!!
In other words:
there are different "LEVELS" or severities of a t206......usually classified on the level of severe/ slight.....some slight "ghosts" some real dramatic.........hence the price varies greatly
some in magenta, some in black ink, some are very close to the "drunken " registers.....
SUMMATION:
Tenney has a "slight ghosted tenney player image" seen to the right of the players head.....and the card displays a slight color shift also
I hope this didn't add to the confusion
Peace
Johnny