Are you looking for a MDR ↔ MDSAP gap analysis? I'm not sure if I have seen one but this is the place to ask if that's what you are looking for.
For both systems, companies have chosen to withdraw from the respective jurisdictions as they were deemed too high of an investment for lesser return. For my situation, for example, our poor European sales didn't warrant the cost to upgrade for the MDR. When Canada declared MDSAP as the sole QC system, many companies withdrew their products for similar reasons. The Canadian government has always dodged the question when asked for specific numbers of medical device registrations before and after the legislation. I cannot state what the situation is in MDR countries, however our Canadian based company is often approached by MDR based companies for product and have received similar stories.
In my opinion, both situations have caused a decrease in product availability with no real increase in patient safety, but that's an argument for another day.