Here's some pix.
To move the pictures over to see more, use the scroll bar under the bottom of the last picture at the bottom of this post, and it will move all the pictures so you can view the entire photos.
Turbo Twin
Crusader Sport
Apparently, the way they painted the tanks was a ittle different, probably to provide distinction between models. The black rubber knee-pads were stick-ons, and could be on either model.
The earlier Crusaders in the 1950s had the panelled tanks, with the removable chrome panel with the emblem on it.
If you want to use a Crusader tank, use the later Crusader Sport tank from the 1960s, because it is much closer style to your Turbo Twin original tank.
Early Crusader Standard