Gojo and Geto
I've seen so many posts and fanarts about the similarity of their death and as much as I can understand the "body being used by others" part, I can't see how either could be seen as tragic. Maybe it's because I find it hard to sympathize with a genocidal racist, but I don't really feel anything when I think about Kenjaku using his body. One murderer got replaced by another. It may be sad because we can assume he didn't want to be used in that plan to trick Gojo, but that's it.
Gojo died the way he wanted and allowed the others to use his body. It hasn't been taken against his will or used in a way he hated. It can't be compared to Geto. It may not be a happy ending, but it's not tragic either. Does any sorcerer get a happy ending in the first place? It's a shitty job that leads to a shitty death, but Gojo, unlike Geto, accomplished his dreams. He led the next generation to victory and I find it very satisfying that it wasn't him but his students who won against Sukuna. It's that much more rewarding.
In conclusion, Gojo and Geto do not share the same fate. One died happy, the other accomplished nothing and got his body snatched by another villain.