I don't think it matters too much especially as she is so young.

Mazie was 12 weeks when we got Mickey and she was very nervous, shy and kept to her own company. Mickey is the complete opposite and loves everybody and lots of attention. Mazie has been a completely different cat since we got him and has even started sitting on our laps, letting us pick her up and being a lot more affectionate!

I think when the are so young they find it much easier to get on and always find a common ground in playing!