So is there some Sort of additional CRC or not?
If a single Values can be changed without any Problems then there is probably no real CRC but still there could be a Thing like a Contentindependent Lengthcheck. I don't have enough Saves, especially non with only one Value changed like one with Gold 20000 and another with 20001 or also in that case one where eg. the Gold needs 2 Bytes and another one 3 Bytes to store but everything else is unchanged. This way it would be easier to check if there is something like that.
And if there is something, they do it for all Files, so it would be possible to make two Saves where on one only the Name of the Hero is changed to one more Char so that Length is one more, if it is possible to change names, i don't know because i don't have the Game... ;)