While that is useful general data it doesn't tell what cards sell, it could be just the seemingly never ending fire sale on Polaris that is boosting sales. The Q-Q (42.2% boost Q2>Q3) results aren't so rosy for AMD so while compared to last year they are up, compared to the last 3 months not so much.
AMD Q2 19 = 32.08%
NVIDIA Q2 19 = 67.92%
Fact is that there is no reliable and detailed method of determining what card outsold which, just a general trend which can be based on anything (except 2080 Ti outselling any other card

).
Yes, the Q2 to Q3 numbers show a better pictures of what is outselling what. Not the Q3 over Q3 yearly numbers. Using q3/q3 year on year makes little sense. Particularly if we are going to demonstrate Turing vs Navi sales since neither card was available in q3 2018 and thus has no relevance. This as a result is a red herring. AMD particularly low marketshare in 2018 q3 were the result of mining glut and and an oversupply of polaris cards. Add in the used market and people were just not interested in buying polaris. Nvidia had this problem but to a lesser extent. Nvidia was insulated a bit due to being the more popular design in laptop and system integrators. Both suffered but more so AMD which resulted in AMD having to do more severe pricecuts to sell their cards. Overall for a Company, AMD numbers didn't fall as much because of the CPU division which were not impacted by the mining collapse.
Q3 2019 numbers are the quarter where both cards are available and are thus the only relevant numbers we should look at(q4 eventually too). As was shown by the numbers, Nvidia gained marketshare. Not only that, Nvidia financial number got way better in q3 vs q2 beating expectations. Particularly the gaming revenue segment. Nvidia beat analysts predictions by 120 million dollars. AMD on the other hand didn't quite meet revenue expectations on their earnings.
https://www.investors.com/news/technology/amd-earnings-q3-2019-amd-stock/
Considering Q3 was the quarter, Ryzen 2 and Navi came out, this should have been a quarter where AMD crushed expectations. But they didn't. Look at AMD CPU and Discrete's revenue 1.276 billion in q3. Very good no doubt compared to earlier quarters but significantly less than the 1.66 billion from Nvidia gaming division. Analyst were expecting Nvidia to sell 1.54 billion in their gaming division. So why did analyst get it wrong. The answer is Navi did not provide the competition expected.
120 million added to AMD GPU discrete division would likely boost their GPU revenue numbers by atleast 33% if we assume most of the CPU and GPU division revenue is coming from CPU which is the right assumption, the strength of Ryzen/Ryzen 2 vs Intel, and the total addressable market of the CPU market(10 billion plus quarterly)vs GPU(2 billion Quarterly). So what is happening? This should have been in AMD's pocket not Nvidia's if AMD was taking marketshare from Nvidia.
What is happening is the Nvidia's super cards are not only outselling Navi, they are doing so significantly. Nvidia's q2 vs q3 growth nearly match AMD's but they are doing this purely with Discrete gaming GPU's. AMD has Ryzen 2 in the equation which is likely the source of most of this growth.
Still don't believe me? Look at how aggressive the pricing of Navi GPU are now and all the promo's being thrown around. When Navi launched, it had no game bundle was priced at 350/400 for the 5700/5700xt respectively. Now we see the 5700 series being priced at $290 regularly and a game bundle. Same with the 5700xt. AIB 5700xt can be found in the 350-380 range along with the game bundle. Compare this the super series where there discounts do not take them below MSRP and the cards don't even come with a game and you can tell AMD is having a bit of problems moving Navi Stock while Nvidia is having an easier time selling super cards.
One last thing to add is Nvidia numbers grew in terms of marketshare between q2 and q3 of 2019 with the latter being the quarter Navi was on the market. If Navi was selling so well, how would Nvidia gain significant marketshare in the quarter it became a factor?