No they don't, they are generally stronger have longer reaches , and can lean on opponents and use their weight to tire them out most of them hit harder too. Just saying they are a bigger target is simplistic and dishonest. Haye is listed as 6'3" he might be a shade under that but he is more than 6'1" and he has always been a better heavyweight than Chisora. Saying he isn't even a good heavyweight is silly when prime who beat him apart from Wlad?
No not really. Just the tall guys who are 6'5+ have longer reaches. The only ones that lean on opponents and use their weight to tire them out are the Klitschkos. No one else does that. Their punching power is a myth. Liston, Williams, Foreman and Shavers hit harder than Lewis, Bowe, Tua and the Klitschkos. The other lesser known guys like modern super heavies such as Chisora, Pulev, Fury, Parker, etc have average power no more notable than an average classic heavyweight. Haye is no more than 6'1 lol he's the same height as Chisora maybe a little less who was about 6'1.5 (listed height so that probably isn't true). He barely fought any heavyweights when prime lmao.
We don't know if Superheavyweight is a made up nonsense. I mean what is it? A 6'1" 250 guy is just a 6'1" guy 30lb-50lb heavier than joe Louis. Louis was The ultimate classic sized heavyweight. With few exceptions The 6'3" guys all used to be 220lb up to the 1980s. Now they weigh 250lb. There always 6'5" guys in every era. Dempsey fought them. Joe Louis fought them. Ali fought them. I wonder if cruiserweight made guys want to put on weight just to bypass it.