WHMCS MU Provisioning versus Prosites

Hi there,

I have a (perhaps dumb) question. What will this plugin do for my multisite install that the Prosites plugin won't do?

Can they work side by side? Or should I use one instead of the other?

Because I have WHMCS so integration sounds good. But Prosites can also handle orders from my website and asign them levels which also sounds good.

Your help is realy apreciated.