Starex is a 11 seater car, if you don't utilize the last row seats, you can put them down for more luggage space. Alphard and estima are 7 seater, if you use all the seats for 7 people, the trunk space for luggage is very minimal, probably can fit 2 large luggage and some small duffel bags.

Also, starex runs on diesel engine, should provide more torque for long distance drive, less tiring