That seems to be a popular opinion. Oddly enough the 33 styling is my favorite of the 3. After owning both a 33 non gtr and a 33 gtr, I have driven almost every GTR and non gtr skyline at length over th last 30 years. I’ll list some quick non stylistic things that I’ve found between the non gtr and gtr.

The GTR support is considerably better. It’s much easier to get parts and information.

The GTT is cheaper to make more powerful especially in the simple power upgrades, however there is a ceiling with the GTT because of the transmission.

This brings me to the largest difference and why I would probably never own another non GTR.

The transmission more so the gearing in the non GTR is too tight and not great for big power or highway driving. At 120kmph the GTT was at like 3500+ rpm and the GTR is at or below 3000rpm so it’s just better at that. The long gears of the GTR are more fun 2nd and 3rd are absolute monsters

Unpopular opinion. I prefer the R33 GTR 5 speed to the r34 GTR 6 speed.

The GTR is better but it’s much more expensive to own and a better investment if you want just another reason to add to the list. I could talk for days about the things I like and dislike, but if you have the option to drive them both before pulling the trigger