StopStart:
The perception of the public is that:
1. They wouldn't know the airframe difference, only, once inside, whether it's single aisle or twin aisle, whether there is enough room in the overhead and under the seat to stow all the carry on baggage; whether the seat is comfortable and how much legroom and elbow room prevails.
2. The cost of the ticket.
3. Day, date and time of departure/arrival.
4. Will the flight be on time?
5. Will checked baggage arrive simultaneously?