correct, there is no answer. I believe that because in this art that 'eschews' competition, when that was asked, the sensei was not asking about Aikido. She was engaging in a meaningless competition with you as her medium...
Even so, I have had Sensei ask me which Nikyo I liked better, hers or Sempai. DANGER! No right answer! Sensei is very polished, Sempai very strong - both work!
If I may ask, how did you respond?
Easy. I answered "It's Nikyo, Sensei." Wisdom comes from marriage as well as martial art.