Was thinking about this the other day, for the sake of simplicity the scenario is Brazier retires right now as it's impossible to tell if he'll ever get back into 2019/2020 form (even though I think there's still a chance of that). Brazier obviously had a higher high with his WC gold and American Record, but Symmonds has a WC Silver and made multiple World/Olympic teams while being domestically dominant for a long period. I think an argument can be made for both of them, but personally I would lean towards Brazier's over Symmonds.