See Chrono Cross technical analysis from the Digital Foundry channel; The game works best on ps1

Digital Foundry Channel released a technical analysis of Chrono Cross: Radical Dreamers Editionthe classic PS1 remastered that was Released this week.

In short, the channel refers to these properties in its analysis (grouped in Reset):

New music for the home screen;
new character art;
AI enhanced wallpapers, also have original wallpapers;
The AI did not appear to have been trained to handle a CC background, which resulted in a poor level;
3D elements are between 900 and 936 pixels, even in classic mode;
There are new models in the new mode, looks good;
Menu 1080p for PS4 / Switch;
Classic mode text is a more pixelated font;
The classic mode contains old illustrations, while the new mode contains new illustrations;
New art is good, but money is poor, and there is disparity;
The FMV introduction has been upgraded, but it’s good;
Some FMV songs are compressed;
The game’s music sounds more clear due to the simulation;
Performance is poor: frame rate is dynamic;
Exploration/battles at 30fps, and menus at 60fps;
In the new mode, which drops a lot, you can hit 10 frames per second in battle during the great moments;
PS1 works better than PS4 which works on PS5;
The title screen runs at 12/13fps, PS1 runs at 10fps;
Classic skins work better than new skins, similar to PS1;
The game on the Switch has essentially the same behavior, and in portable mode it seems to work better.