It makes a lot more sense listening to what airlines plan than reading capacities on the manufacturers' websites. Both Boeing and Airbus grossly overstate capacity principally by using seat pitches much less than the market will accept.
For example both manufacturers tend to use 39" as the seat pitch in J Class when quoting capacity. These days an international J Class with 39" would be unmarketable. The average pitch is now over 50" in this class.