I take it the small modifications for the cargo model in the cockpit are there. (the smoke detectors and removal of one recircfan springs to mind).
I'm not 100% sure here, but there are many variants of the Saab rolling around, and we've had to stick to "one". So many different panel configs, etc. It may be so that Saab standardized the Cargo variants, but I don't have any clarification on this.
Please be aware this is modeled after the A. Our primary concern is the passenger variant, and if the cargo variant has mods in it where smoke detectors are removed then we're not really concerned about that. The cargo version is thrown in as a bonus, and these are small factors that will have to be lived with.
Minus the cabin differences visually, if it's in the 340A passenger systems, it's in the cargo version. Non-issue, really.