Definitely not. They are both bad. You just have your nostalgia glasses on.
Also people have blinders on regarding this as he was so good in ANH and ESB, but Harrison Ford was not good in this movie (ROTJ that is). His delivery of lines was bad. It's like you could tell he was "done with this star wars shit" as you saw over the next couple of decades from him in interviews.
Listen to some of this dialogue and watch this acting, it's quite bad:
https://www.youtube.com/watch?v=giASrSW_tl8
Mark Hamill is what saved that movie. Carrie Fisher and Harrison Ford were checked out.