Not quite true... There were some improvements from the R32 to R33 evolution, especially in the ATTESA (4WD) system.
The ATESSA-ETS in the R32 model updated it's information 4 times per second.
The ATESSA-ETS in the R33 base model updated 20 times per second, and the ATESSA-ETS PRO system in the R33 GTR V-Spec updated 1000 times per second.
Also, the ATESSA-ETS PRO system in the V-Spec came with an "Active-LSD" in the rear, that proportioned torque electronically laterally between the two rear wheels, as well as longitudinally between the front and rear wheels. In the R32 GTR and base R33 GTR, the ATESSA system only controlled torque split longitudinally between the front and rear.
Another difference is the brakes. The majority of R32 GTRs used Sumitomo-brand 4-piston brakes. These came with 296mm x 32mm brake rotors. The very rare R32 GTR V-Spec 2 and the entire R33 GTR range were blessed with the famous Italian BREMBO 4-piston calipers and rotors measuring a considerably larger 324mm x 30mm. Thus, the braking system was VASTLY improved on the R33 GTR range.
People who claim that the R32 GTR is a better car are usually people who have never driven both the R32 and R33 GTRs, and are just dreamers who love talking about cars they've never owned. They spend their time quoting other people's opinions on the matter verbatim and pass it off as their own. They're just sheep. Don't listen to them.
The R33 GTR is between 30-60kgs heavier than the R32 GTR, depending on spec levels. With improved suspension geometry in the R33 GTR, this weight gain is negligible, and hardly noticeable unless you drive both cars back-to-back.
Here are links to the specifications of all three models of GTR:
http://www.gtr.co.uk/html/technical/r32.asp
http://www.gtr.co.uk/html/technical/r33.asp
http://www.gtr.co.uk/html/technical/r34.asp
Good luck with the assignment.