The Tank Museum two Tiger II tanks, one with the original turret and one with the production turret.
This is the production turret, with the flat front plate to the turret. Interestingly, this one has Zimmerit covering on the sides of the hull and the turret.
Detail on the skirt.
This is a Tiger II with the original turret design.
It was designed to fit both the Porsche design of the Tiger II and the successful Henschel design. The design had both production and ballistic issues.
This was a prototype, hence the lack of Zimmerit.