Sure, you could use either metrics, but it shows the same thing: Samsung China's market share in 2012 was 17.7% (30M). Xi came to power in mid 2013 and Samsung's sales in each quarter 2013 were 18% (12.5M) in Q1, 19% (15M) Q2, 18% (17M) Q3, and 19% Q4 -- ie, it's a steady YoY growth, in relative % or absolute terms.
In other words, Samsung's sales were not affected by local competition "right before" or "around" Xi. Only after Xi's "In China, For China," both market share and absolute sales plunged from 17.7% (2012), to 19% (2013) to 7.9% (2014) or 31M (2012), to 70M (2013) to 35M (2014).
Again, this was isolated to China and as a result of Xi's anti-foreign policy in China only -- Samsung's sales continue to grow outside China to maintain their global lead.
Further, I cited McGee's recent excellent work which clearly demonstrates how Xi's anti-foreign policies suddenly changed business climate in China against foreign competitors -- which starts at Part 5: Political Awakening, Chapter 26 -- why it has everything to do with "The DESPOT." Not market competition, or THAAD/Note 7 fire.