The 787-8 is quite a small airplane actually. Boeing says on its website that it aims for the 210 to 250 seat market, the latter one in an all economy configuration. The 787-9 will be a better comparison to the A332 in my opinion as it aims at the 250 to 290 seat configurations. Probably i'm a bit biased because we operate the A332 in a 303 seat two class configuration and the A333 (which is going to leave the fleet soon) in a 387 seat all eco configuration.