No - I haven't done a comparison matrix. I can't recall a specific thread with the specific differences.
I can say from my read it's not really significantly different. There is, in my opion, some latitude in places that QS didn't have and some clarifications if only by clearer verbiage.
For a company which is QS registered, there isn't going to be much different. The main point will be that your company 'expert' be ready to explain your systems in terms of the verbiage in 16949.