The interesting point is: As with all Star Wars games, the universe has been expanded for gameplay reasons. But in this case, the universe has become more hostile. A few examples:
Super ANH:
-Once only 2 meters wide, Womprats are now twice your size. And there's even a King Womprat!
-The Sarlacc may not have a beak, but it can now rise 25 feet high and throw fireballs at you!
-Jawas now kidnap robots and their Sandcrawler is a war machine!
-Luke's landspeeder has turbo jet and can now fly into the sky!
-There's giant scorpions in the desert!
-Jawas scour the desert on hoverchairs and throw thermal detonators at you!
-Luke must now rescue C3PO and R2D2 instead of buying them.
-There's a giant lava monster in the sandcrawler!
-R2D2's chess piece now comes to rip you to pieces inside the cantina!
-Now YOU can shoot Greedo! (Just make sure he doesn't shoot you first.

-There's a gigantic robot in the Death Star's hangar bay!
-Now YOU must deactivate the tractor beam!
Super ESB:
-There's a gigantic probe droid four times the size of a normal one!
-There's a gigantic wampa head with arms but no legs that can freeze you with his breath!
-You can ride a speeder bike inside Echo base!
-What was once a calm, tranquil swamp is now infested with hostile jungle monsters! Luke must now save R2D2 himself and find Yoda while surviving the jungle!
-Chewie must now shoot Ugnaughts to free C3PO!
-Luke now has to fight cloud cars (or are they TIEs?) to reach Cloud City.
-Chewie now goes 1-on-1 with Boba Fett!
-You actually beat Darth Vader and keep your hand! (But then how does Luke find out Vader's his father?)
Super ROTJ:
-The team now flies in a hi-tech Landspeeder to reach Jabba's palace!
-The team must now cross a dangerous canyon to reach Jabba's palace, where the "greeter droid" is now four times your size and electrocutes you!
-You're forced to fight in front of Jabba.
-Luke must now find the Rancor inside a spiky maze.
-The Ewok village is now infested with nasties!
-Luke no longer needs to surrender to Vader, because he now has to fight hulk cyborgs in order to board a shuttle!
-The Shield Generator doesn't need protection. The nasty machines do their job well!
-Once on the Death Star, Luke has to climb a tower full of Imperial nasties!
-The red guards combat you. (They learned how to fight after what happened in ROTS.

-Now Luke fights and kills the Emperor! (Which is funny, because I thought Luke would turn to the Dark Side if he killed the Emperor. And now how is Vader supposed to redeem himself?)
Another interesting thing is: I loved Super ROTJ, and asked for it as a present one time. But instead, I got Super ANH, and ROTJ on video. I still have those to this day.