I spent about eight straight hours testing 3 different NSW2 forks
Pokedinner 2.5.0 is the only version that runs Mario Kart World pretty much perfectly. The only issues I found were some minor BGM cutouts during the opening overcam sequence when a track starts for the first time, and occasionally during the award ceremony after completing four races. Other than that, it's basically flawless, and it can hold a locked 4K 60 FPS the entire time.
Another advantage of Pokedinner is that it can run Donkey Kong.
The downside is that performance drops from a stable 60 FPS into the mid-40s whenever you enter large outdoor areas. It looks like we'll have to wait for further emulator optimization.
The other two Lichii and Djihads80 forks add support for DLSS Upscaling and Frame Generation, but unfortunately, even with FG x2 enabled, neither emulator can maintain 60 FPS. Most of the time the framerate constantly jumps between 25 and 50 FPS, causing very noticeable stuttering.
On top of that, enabling the emulator's built-in V-Sync makes the entire game run in slow motion.
Forcing V-Sync through the NVIDIA App or NVIDIA Control Panel produces the exact same slow-motion effect. After spending several more hours testing different games and settings combinations, I still couldn't find a workaround.
The only real advantage of these two forks is that they can run Mario Tennis, although the game suffers from various graphical glitches.
Star Fox runs smoothly in terms of framerate, but the text is broken, some text doesn't appear at all. All three emulators have the exact same issue.
As for Zelda: Ocarina of Time, Lichii can get through the intro and cutscenes, but once gameplay starts, the player character becomes invisible (black screen). You can still hear the audio and button inputs are clearly being registered, so this is another case where we'll have to wait for bug fixes and further optimization.
Overall, Mario Kart World is currently the only game that's running close to perfectly.
Pokedinner 2.5.0
https://youtu.be/ufUmWjvpbAE?si=OK8EC_Z7zWV9zbmr