None of the current HW fighters should even talk about the past greats because they obviously haven't followed in there foot steps. I'm with Tyson on this one. Also surely you should atleast have to be undisputed to hype yourself to that level.
Not when there no where next to the same in ability. I know you have to as a boxer try to promote yourself but when your not very good it ends up being an insult. People get upset with PBF comparing himself to the likes of Ali and he has skill.
I remember reading here that the reason he calls himself 'The White Tyson', isn't because he thinks he's as good as Tyson or fights like Tyson. The reason he gave himself that nick is because like Tyson, he sees himself as a smaller man beating up bigger men.