Support Center vs. Service Desk road maps and service packs

Hi there,

Is there any correlation between Service Desk and Support Center development? I.e. if certain feature has been implemented in Service Desk already, can I assume it to appear in Support Center, too (if it is general enough by its kind to fit to both products). Or on the other hand, is it expected those product to evolve more to separate directions, having more dedicated features?

I would basically like to swap from SD to SC since we support several organisations in addition to our own, and we don't use inventory nor purchasing modules but so far it seems that SD is ahead with patching and new features.

Tapsa