Wikipedia says 9.6, 9.8, and 10.0 million km^2 respectively. Do these numbers include something (e.g. water) that the numbers you quoted don't? (They also peg Russia at 17.0 million km^2)
The numbers are land-only, but there are multiple conflicting ways of calculating it often due to land disputes. For instance, Taiwan/Tibet/etc. wrt China
