Oh, OK, sorry, I misunderstood your question!  In my training I was taught to find the best match between a question and a common meaning of the question.  For example, “are ubers or taxis better” is not a common phrase.  However, “which is better, Uber or a taxi” or “which is better, Uber or taxi” would both make sense to me.  Can you say something similar to either of those?
assitant
Uber is much better.  The cars are more clean and comfortable.  They have a map of the area, and use a shared rating system, so you’re guaranteed a good driver.
assistant
Are taxis or ubers better?
user
I’m sorry I didn’t understand the question. Would you mind asking me again?
assistant
which is better, uber or taxi?
user