She thought 10 might have been a later version of the Doctor, and therefor would know her. When she realizes he is not a future incarnation she makes a comment about how young he looks. The irony of course is that 11 was actually a younger looking doctor than 10, a fact not know when SITL was written (Moffet probably assumed the next doctor would look a little older at the time). As far as the 'Who are you' line, 11 still did not know Rivers history or who she really was (Melody Pond), of course know he knows everything about her.
AP - Star Trek: Renegades
- Starring Walter Koenig, Tim Russ, Robert Picardo & many more - Coming early 2015 - www.startrekrenegades.com
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