Hi there!
the salary for the lufthansa cargo is about the same like for the classic but as far as I know are the possibilities in general not that good if you want to change to the classic e.g.
You have to bear in mind that we have to pay about 53% tax on the 6300DM but on the other hand one has many benefits within the lufthansa company.
For ready entries with several hundreds or even thousands of flying experience the lufthansa is not really a good choice as no matter how many flying hours you got everything within the company is refered to the seniority and not to the experience!!!
mfg,
downgreen