Have a look here Car size comparison. Choose make and model to compare

 

Obviously you need to take the buggy with you and try it in the boot.
The T Cross rear seat is split and will slide back and forth by six inches to give more room when needed. The tailgate barely slopes so a useful space. And the car is easily manoeuvred in city type environment and economical to run.
No experience of your other options I afraid.

 

As per #3 above, take your buggy along and try it in each car. Check out movable boot floor options too