Overall the addition of Brando, slightly better pacing, the removal of the ridiculous amnesia kiss, the S throw and one or two less fluffy moments put this just above the theatrical version. It doesn't really work as the end of Superman 1 is changed in the process and there is the addition of screen tests where Lois and Clark look different but disregarding that I think that this is a better version.
Notes on the Differences:
-the beginning / no Eiffel tower/terrorism plot at the start
-missile from SM1 cracks villains out of glass instead of a bomb from the elevator.
-no Clark walking across the streets into the car.
-no orange juice.
-why they go to Niagara Falls is explained by Perry White not briefly by Lois in the hotel.
-they don't get a tour of the hotel room.
-Lois doesn't quiz Clark after the Niagara Falls incident.
-different hotel - screen test
-father talks to Luthor in crystal not mother.
-Luthor dubbed
-Lois jumps at the start off the Daily Planet building, not into the rapids in Canada. Superman doesn't come like in the theatrical version.
-Lois shoots with a blank at Clark instead of Clark tripping and his hand going into the fire but not being burnt in the hotel.
-3 villains in the country town scene is different. no arm wrestle.
-no kid asks Zod to put his daddy down
-no superman collecting food for dinner from forest
-talks to father instead of mother when his powers are regenerated. -Conversation has a bit more bit to it. comes out in normal clothes. losers the superman outfit.
-Washington Monument takes the place of Mount Rushmore
-major fight scene varies. Statue of Liberty. no baseball hit. The underground fight lasts longer.
-concluding fight doesn't occur. no throwing the giant s and multiple supermans.
-Lois and Clark don't discuss the need to not be together.
-no amnesia kiss. instead rotates the world back to where he did at the end of the 1st
-pizza instead of hamburger-screentest
-no president scene at the end