Can Splatoon sell 1 million lifetime in Japan?

[Angelv577]

Skullwaker said:

Angelv577 said:
it definitely can but according to vgchartz, Mario kart 8 hasn't reached 1m yet so I'm not sure if splatoon will be able to reach 1m. Although total Mario kart 8 sales is ahead of splatoon by 159k. Still I wouldn't be surprise if splatoon do it looking at the recent legs.

MK8 reached 1m retail in Japan about a month or so ago, according to Media Create and Famitsu.

Vgchartz is undertracking it then.  how much is the difference?