Vote.... going up = roy jones going to heavyweight going down = oscar going to 147 for pac (they were the first examples to come to my head)
This is difficult to answer. By 'going up' do you mean people who can't be arsed to make the weight like Guzman? And by 'going down' do you mean people who have been whipped and return with their tail between their legs like Herbie Hide? If so then by those standards I've listed I say going up is worst- if fighters are challenging themselves and come up short in a higher weight class then that is no bad thing, IMO. Lazy *******s who can't be arsed to make weight **** me off.
Either way, it may affect your total performance but it still depends on how the fighter can cope up w/ change in weight.