I'd say SW is a great deal more kid friendly than ROTJ.

Brutal senseless execution of the terrified dancer. The pigman being eaten. The rapey vibe with Leia and the close up as Jabba is brutally killed. Yoda dying. The Emp is terrifying. Luke being tortured on camera, screaming for help. Vaders moral ambiguity at the end. Vaders sad, creepy death. The dead Ewok and his sad friend. The funeral pyre. Lots of troubling imagery and story.

In SW Greedos death is played for laughs. Biggs death and Alderaans destruction are both over after one good scream. No one suffers, there's very little fear. We don't see Aunt Beru running for her life. I think it adds up to a very different tone.