According to the website:
"... Some King Tigers of the sPzAbt 506 and SSsPzAbt 501 were equipped with 18-teeth sprockets and the new track Kgs73/800/152 for test purposes.
This new kit features this variant of the King Tiger"
FEATURES:
New-Tooled Parts:
Kgs 73/800/152 track link
18-teeth Sprockets
New Gun Shield
Road wheel
Special Features:
Additional 18-teeth sprocket
Two kinds of gun shield for option
New-designed photo-etched parts
Metal cable wire
Cartograf decal
Bonus:
Volksgrenadier x 4
Aluminum barrel
Brass 88mm ammunition
It's got a lot of nice extras but I wonder if you can still build the standard version or have only the 18-tooth and track option...