You could compare Qantas & Emirates seat maps as they have Economy in the same space.
http://www.seatguru.com/airlines/Emi...irbus_A380.php
http://www.seatguru.com/airlines/Qan...irbus_A380.php
A simple answer - 'lots'.
http://www.seatguru.com/airlines/Emi...irbus_A380.php
http://www.seatguru.com/airlines/Qan...irbus_A380.php
A simple answer - 'lots'.