Tough call. I'd rather be the youngest, and retire before I was 30. Live off my clebberty and make a come back or two. To Answer the acatual question. I think a lot depends on who you beat. I would say that as it stands Wilfred Benitez beating Antonio Cervantes is more impresive than Bernard Hopkins beating Jean Pascal.
oldest no one expected Foreman or Hopkins to win a title at their age, young guys can be matched up against bums to win titles at an early age to create hype around themselves
Oldest because its much more reliant on mental skills because you will usually be athletically outmatched
Oldest, knowing you can still go out and beat good competition aftr losing your speed and other physical gifts is more impressive imo
Super hard question If they are a physically underdeveloped young fighter then it's more impressive It pretty much dependent on the fighter and situation... Mike Tyson winning at 19 years old - Impressive Watching Foreman KO Moorer - F*cking amazing It a question that can't really be answered. Lack of case studies to analyse and judge off.